Physical Sciences P1 November Exam (Mix)

<p>Gravitational force</p> Signup and view all the answers

<p>Normal force</p> Signup and view all the answers

<p>Tension force</p> Signup and view all the answers

<p>To isolate the object from its environment and focus on the forces directly affecting it</p> Signup and view all the answers

<p>The magnitude of the frictional force is dependent on the normal force and the nature of the surfaces in contact</p> Signup and view all the answers

<p>Static friction acts to prevent relative motion between surfaces, while kinetic friction acts against the motion between moving surfaces</p> Signup and view all the answers

<p>The net force is always the sum of all the forces acting on the object</p> Signup and view all the answers

<p>To represent all the forces acting on a single object</p> Signup and view all the answers

<p>Tension is a pulling force, while applied forces can be either pulling or pushing</p> Signup and view all the answers

<p>To identify all forces acting on an object, represent them, and apply Newton's laws to establish relationships between these forces and the motion of the object</p> Signup and view all the answers

<p>All of the above</p> Signup and view all the answers

<p>The net force is directly proportional to the acceleration</p> Signup and view all the answers

<p>To calculate the net force acting on an object</p> Signup and view all the answers

<p>Both a and b</p> Signup and view all the answers

<p>They act on different objects, are equal in magnitude, and are opposite in direction</p> Signup and view all the answers

<p>Identify all forces acting on the object(s)</p> Signup and view all the answers

<p>To visualize the forces acting on the object(s)</p> Signup and view all the answers

<p>To ensure they are identified and correctly applied</p> Signup and view all the answers

<p>Mass refers to the amount of matter in a body, while weight is the force of gravity acting on the body</p> Signup and view all the answers

<p>It is directly proportional to the product of their masses and inversely proportional to the distance between them</p> Signup and view all the answers

<p>It provides the proportionality factor needed to compute the gravitational force</p> Signup and view all the answers

<p>Mass is a scalar quantity that represents the amount of matter in a body and does not change regardless of the object's location</p> Signup and view all the answers

<p>Both a and b</p> Signup and view all the answers

<p>To visualize the forces acting on an object and their interactions</p> Signup and view all the answers

<p>The object will remain in a state of rest or uniform motion</p> Signup and view all the answers

<p>The acceleration of an object is directly proportional to the net force and inversely proportional to its mass</p> Signup and view all the answers

<p>To prevent passengers from continuing to move at the vehicle's original speed due to inertia</p> Signup and view all the answers

<p>By resolving the gravitational force into components parallel and perpendicular to the incline</p> Signup and view all the answers

<p>The forces are equal in magnitude and opposite in direction</p> Signup and view all the answers

<p>By identifying the forces acting on the objects suspended by the cables or strings</p> Signup and view all the answers

<p>The acceleration of an elevator moving upwards or downwards</p> Signup and view all the answers

<p>By visualizing the non-contact forces and their interactions</p> Signup and view all the answers

<p>To understand and solve complex mechanical problems</p> Signup and view all the answers

<p>$mv$</p> Signup and view all the answers

<p>Quadratically</p> Signup and view all the answers

<p>Impulse</p> Signup and view all the answers

<p>Mass and velocity</p> Signup and view all the answers

<p>By a vector quantity</p> Signup and view all the answers

<p>$\vec{p} = mv$ equation</p> Signup and view all the answers

<p>Momentum of objects in a straight line</p> Signup and view all the answers

<p>$p_{final} - p_{initial}$</p> Signup and view all the answers

<p>J = Fnet * Δt</p> Signup and view all the answers

<p>Impulse and change in momentum</p> Signup and view all the answers

<p>All of the above</p> Signup and view all the answers

<p>All of the above</p> Signup and view all the answers

<p>All of the above</p> Signup and view all the answers

<p>The total linear momentum of an isolated system remains constant if the net external force is zero</p> Signup and view all the answers

<p>Kinetic energy is conserved in elastic collisions, but not in inelastic collisions</p> Signup and view all the answers

<p>Assign a positive direction to the motion</p> Signup and view all the answers

<p>The system experiences only internal forces</p> Signup and view all the answers

<p>To determine the impulse and change in momentum</p> Signup and view all the answers

<p>w = mg</p> Signup and view all the answers

<p>Weightlessness occurs when the only force acting on an object is gravitational, leading to free-fall.</p> Signup and view all the answers

<p>They are in continuous free-fall towards Earth.</p> Signup and view all the answers

<p>The gravitational force acting as a centripetal force</p> Signup and view all the answers

<p>The gravitational attraction between the Earth and the Moon</p> Signup and view all the answers

<p>p = mv</p> Signup and view all the answers

<p>Impulse is the change in momentum over time.</p> Signup and view all the answers

<p>The Moon has a massive momentum, and asteroids impart insufficient momentum to significantly alter its trajectory.</p> Signup and view all the answers

<p>The truck has a higher mass and, therefore, a higher momentum.</p> Signup and view all the answers

<p>The falcon imparts a greater momentum due to its higher mass.</p> Signup and view all the answers

<p>To visualize the direction and magnitude of an object's motion</p> Signup and view all the answers

<p>The vector connecting the initial and final momentum vectors</p> Signup and view all the answers

<p>Determining the rate of change in position of an object</p> Signup and view all the answers

<p>$\vec{J} = \vec{F}\Delta t = \Delta \vec{p}$</p> Signup and view all the answers

<p>The total momentum before the event is equal to the total momentum after the event</p> Signup and view all the answers

<p>The object's change in momentum</p> Signup and view all the answers

<p>The object's momentum increases</p> Signup and view all the answers

<p>To illustrate the relationships between initial momentum, final momentum, and change in momentum</p> Signup and view all the answers

<p>It quantifies the effect of a force applied over a time interval on an object's momentum</p> Signup and view all the answers

<p>Calculating the rate of change in position of an object due to gravity</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>To counteract the weight of an object resting on a surface</p> Signup and view all the answers

<p>Static friction is constant, while kinetic friction varies with speed</p> Signup and view all the answers

<p>Tension force</p> Signup and view all the answers

<p>The cancellation of gravitational and centrifugal forces</p> Signup and view all the answers

<p>To analyze the motion of objects under the influence of various forces</p> Signup and view all the answers

<p>To visualize the interaction between different forces acting on an object and analyze the resulting motion or equilibrium state.</p> Signup and view all the answers

<p>The net force is proportional to the object's acceleration.</p> Signup and view all the answers

<p>Tension is directional, while applied forces are not.</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>To represent the universal constant that governs the gravitational interaction between any two objects.</p> Signup and view all the answers

<p>To analyze and predict the behavior of objects under various conditions.</p> Signup and view all the answers

<p>$W = mg$</p> Signup and view all the answers

<p>To apply Newton's laws of motion to establish relationships between forces and motion.</p> Signup and view all the answers

<p>Normal force</p> Signup and view all the answers

<p>To represent the object as a point or simple shape and isolate it from its environment to focus solely on the forces that directly affect it.</p> Signup and view all the answers

<p>They are equal in magnitude and opposite in direction</p> Signup and view all the answers

<p>To visualize the forces acting on an object</p> Signup and view all the answers

<p>Newton's Law of Universal Gravitation</p> Signup and view all the answers

<p>To provide the proportionality factor needed to compute the gravitational force</p> Signup and view all the answers

<p>The truck has a larger mass</p> Signup and view all the answers

<p>To visualize the forces acting on an object</p> Signup and view all the answers

<p>The text does not discuss any difference between a mosquito and a falcon landing on your arm</p> Signup and view all the answers

<p>Kinetic energy is proportional to the square of velocity</p> Signup and view all the answers

<p>Free-body diagrams are not applicable to electrostatic or gravitational interactions</p> Signup and view all the answers

<p>Impulse is used to calculate the change in momentum of an object</p> Signup and view all the answers

<p>All of the above</p> Signup and view all the answers

<p>The acceleration is directly proportional to the net force and inversely proportional to the mass</p> Signup and view all the answers

<p>To understand how forces interact between two objects in contact or interaction</p> Signup and view all the answers

<p>By resolving the gravitational force into components parallel and perpendicular to the inclined plane</p> Signup and view all the answers

<p>To visualize the direction and magnitude of all the forces acting on an object</p> Signup and view all the answers

<p>The object will continue moving at a constant velocity</p> Signup and view all the answers

<p>The normal force is independent of the frictional force</p> Signup and view all the answers

<p>The astronauts are in a state of free fall around the Earth</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>The forces are equal in magnitude and opposite in direction</p> Signup and view all the answers

<p>$m \times v$</p> Signup and view all the answers

<p>Momentum</p> Signup and view all the answers

<p>kgm/s</p> Signup and view all the answers

<p>One object's momentum is subtracted from the other</p> Signup and view all the answers

<p>Newton's Second Law</p> Signup and view all the answers

<p>Mass and velocity</p> Signup and view all the answers

<p>$\Delta = p_{final} - p_{initial}$</p> Signup and view all the answers

<p>Magnitude and direction</p> Signup and view all the answers

<p>Everyday experiences and theoretical physics</p> Signup and view all the answers

<p>Direct relationship</p> Signup and view all the answers

<p>The acceleration due to gravity</p> Signup and view all the answers

<p>They are in a state of continuous free fall towards Earth.</p> Signup and view all the answers

<p>The gravitational attraction between the Earth and the Moon</p> Signup and view all the answers

<p>$p = mv$</p> Signup and view all the answers

<p>The Moon's massive momentum makes it difficult for asteroids to significantly alter its trajectory.</p> Signup and view all the answers

<p>$J = F\Delta t$</p> Signup and view all the answers

<p>Trucks have a larger mass and, therefore, a higher momentum at the same speed.</p> Signup and view all the answers

<p>The gravitational force</p> Signup and view all the answers

<p>The mosquito has a smaller mass than the falcon.</p> Signup and view all the answers

<p>It provides a measure of how difficult it is to stop an object's motion.</p> Signup and view all the answers

<p>To visualize the direction and magnitude of momentum</p> Signup and view all the answers

<p>Impulse is equal to the net force multiplied by the time interval</p> Signup and view all the answers

<p>The total momentum remains constant if no external net forces act on the system</p> Signup and view all the answers

<p>The momentum will decrease</p> Signup and view all the answers

<p>To visualize the relationships between initial momentum, final momentum, and the change in momentum</p> Signup and view all the answers

<p>The rate of change of the object's momentum</p> Signup and view all the answers

<p>To analyze and predict the outcomes of various physical situations</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>Predicting the motion of planets and stars</p> Signup and view all the answers

<p>$\vec{J} = \vec{F}\Delta t$</p> Signup and view all the answers

<p>$J = F_{net}\Delta t = m\Delta v$</p> Signup and view all the answers

<p>Both momentum and kinetic energy are conserved.</p> Signup and view all the answers

<p>To increase the stopping time for vehicles, reducing the force and minimizing damage and injuries.</p> Signup and view all the answers

<p>The rate of change of the object's momentum</p> Signup and view all the answers

<p>To visualize the net force acting on an object.</p> Signup and view all the answers

<p>Impulse is the product of the net force acting on an object and the time interval during which the force acts.</p> Signup and view all the answers

<p>To reduce the force experienced by occupants during a collision by increasing the stopping time.</p> Signup and view all the answers

<p>The total linear momentum of an isolated system remains constant if the net external force is zero.</p> Signup and view all the answers

<p>It helps calculate the force exerted, the time duration of the force application, and the resulting change in momentum.</p> Signup and view all the answers

<p>To accurately predict the motion of objects under various conditions.</p> Signup and view all the answers

<p>It is proportional to the distance between the object and the Earth's center</p> Signup and view all the answers

<p>Normal force</p> Signup and view all the answers

<p>It opposes the initial motion of an object</p> Signup and view all the answers

<p>It can be present in strings or cables</p> Signup and view all the answers

<p>Understanding forces' influence on objects</p> Signup and view all the answers

<p>Applied force</p> Signup and view all the answers

<p>Kinetic energy scales with the square of velocity, while momentum directly relates to mass and velocity.</p> Signup and view all the answers

<p>Momentum</p> Signup and view all the answers

<p>$p = mv$</p> Signup and view all the answers

<p>kg·m/s</p> Signup and view all the answers

<p>A larger mass or higher velocity results in greater linear momentum and makes it difficult to stop the object.</p> Signup and view all the answers

<p>The change in momentum is equal to the impulse applied to the object.</p> Signup and view all the answers

<p>In these diagrams, vectors represent initial and final momenta, showing the magnitude and direction of the change in momentum.</p> Signup and view all the answers

<p>Mastering impulse aids in comfortable manipulation of equations involving forces.</p> Signup and view all the answers

<p>They cancel each other out</p> Signup and view all the answers

<p>To visualize the forces acting on the object(s)</p> Signup and view all the answers

<p>Simplify the equations of motion</p> Signup and view all the answers

<p>They act on different objects</p> Signup and view all the answers

<p>To provide the proportionality factor needed to compute the gravitational force</p> Signup and view all the answers

<p>Mass refers to the amount of matter, while weight refers to the force of gravity</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>The absence of gravitational force</p> Signup and view all the answers

<p>To relate the change in momentum to the applied force and time interval</p> Signup and view all the answers

<p>Static friction acts on stationary objects, while kinetic friction acts on moving objects</p> Signup and view all the answers

<p>To visualize the interaction between different forces acting on an object and predict its resulting motion or equilibrium state</p> Signup and view all the answers

<p>Static friction prevents relative motion between stationary surfaces, while kinetic friction acts against the motion between moving surfaces</p> Signup and view all the answers

<p>The magnitude of frictional force is directly proportional to the coefficient of static or kinetic friction between the surfaces</p> Signup and view all the answers

<p>Applied forces are external forces exerted on objects, while tension is a pulling force transmitted through strings, cables, or objects under tension</p> Signup and view all the answers

<p>The net force is directly proportional to the acceleration of the object</p> Signup and view all the answers

<p>To predict the behavior of objects under various conditions</p> Signup and view all the answers

<p>It isolates the object from its environment and focuses solely on the forces directly affecting it</p> Signup and view all the answers

<p>Tension forces are directional and depend on the orientation of the pull</p> Signup and view all the answers

<p>The normal force is always perpendicular to the surface of contact</p> Signup and view all the answers

<p>The normal force is a reaction force that counters the weight of the object</p> Signup and view all the answers

<p>The mass of the planet and its radius</p> Signup and view all the answers

<p>The gravitational attraction between the Earth and the Moon</p> Signup and view all the answers

<p>They are in a state of continuous free fall towards Earth</p> Signup and view all the answers

<p>$F = G \frac{m_1 m_2}{r^2}$</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>The falcon transfers more momentum due to its greater mass</p> Signup and view all the answers

<p>The Moon has a massive momentum, making it difficult to alter its trajectory</p> Signup and view all the answers

<p>$p = mv$</p> Signup and view all the answers

<p>$J = F \Delta t$</p> Signup and view all the answers

<p>To analyze the change in momentum of an object due to an applied force</p> Signup and view all the answers

<p>To illustrate the direction and magnitude of an object's motion</p> Signup and view all the answers

<p>Impulse is the change in momentum divided by the time interval</p> Signup and view all the answers

<p>To visualize the relationships between initial momentum, final momentum, and the change in momentum</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>As a scalar value</p> Signup and view all the answers

<p>To provide a universal scaling factor for the force</p> Signup and view all the answers

<p>Conversion factors between units of mass, length, and time</p> Signup and view all the answers

<p>It provides a direct relationship between force, time, and momentum change</p> Signup and view all the answers

<p>It provides a direct relationship between force, time, and momentum change</p> Signup and view all the answers

<p>The continuous free-fall motion in orbit</p> Signup and view all the answers

<p>To identify all forces acting on an object</p> Signup and view all the answers

<p>To visualize the direction and magnitude of forces</p> Signup and view all the answers

<p>By identifying all forces and ensuring their sum is zero</p> Signup and view all the answers

<p>The components of gravitational force acting on objects</p> Signup and view all the answers

<p>Helping calculate the tension in strings and net force on objects</p> Signup and view all the answers

<p>By illustrating how these forces interact and result in net force on objects</p> Signup and view all the answers

<p>By breaking down forces into manageable components visually</p> Signup and view all the answers

<p>It describes how seatbelts decelerate passengers due to inertia</p> Signup and view all the answers

<p>It considers gravitational pull and net force to determine acceleration</p> Signup and view all the answers

<p>For every action, there is an equal and opposite reaction</p> Signup and view all the answers

<p>$J = F_{net}\Delta t$</p> Signup and view all the answers

<p>Kinetic energy is conserved in elastic collisions but not in inelastic collisions.</p> Signup and view all the answers

<p>To increase the stopping time for vehicles, reducing the force and minimizing damage and injuries.</p> Signup and view all the answers

<p>$J = \frac{m\Delta v}{\Delta t}$</p> Signup and view all the answers

<p>To spread out the force of impact over a longer time, reducing the force experienced by occupants during crashes.</p> Signup and view all the answers

<p>To analyze the motion of objects under the influence of various forces.</p> Signup and view all the answers

<p>To determine the net force acting on an object.</p> Signup and view all the answers

<p>To bridge the concepts of force and velocity.</p> Signup and view all the answers

<p>Both (b) and (c) are correct.</p> Signup and view all the answers

<p>The text does not discuss the relationship between mass and weight.</p> Signup and view all the answers

<p>Static friction opposes motion, while kinetic friction supports the object's movement.</p> Signup and view all the answers

<p>Frictional force increases proportionally with the normal force.</p> Signup and view all the answers

<p>Applied forces initiate motion in objects.</p> Signup and view all the answers

<p>Tension is transmitted through strings, while applied forces are transmitted through contact surfaces.</p> Signup and view all the answers

<p>The object itself</p> Signup and view all the answers

<p>Identifying all forces acting on the object</p> Signup and view all the answers

<p>To provide a simple representation of object interactions</p> Signup and view all the answers

<p>By isolating the object and focusing only on direct forces</p> Signup and view all the answers

<p>By reducing complex situations to simpler terms</p> Signup and view all the answers

<p>Force diagrams focus on environmental factors, while free-body diagrams isolate objects.</p> Signup and view all the answers

<p>Gravitational force is directly proportional to the mass of the object and inversely proportional to the square of the distance between the object and the Earth's center.</p> Signup and view all the answers

<p>The normal force is the support force exerted by a surface against an object resting on it, acting perpendicular to the surface.</p> Signup and view all the answers

<p>The forces in an action-reaction pair are equal in magnitude and opposite in direction.</p> Signup and view all the answers

<p>The gravitational force between the objects.</p> Signup and view all the answers

<p>To calculate the net force acting on an object and its resulting acceleration.</p> Signup and view all the answers

<p>Different objects</p> Signup and view all the answers

<p>Distance between their centers</p> Signup and view all the answers

<p>Normal force and friction</p> Signup and view all the answers

<p>Proportionality factor</p> Signup and view all the answers

<p>Amount of matter</p> Signup and view all the answers

<p>Identifying action-reaction pairs</p> Signup and view all the answers

<p>Effect on motion</p> Signup and view all the answers

<p>Elevators or falling objects</p> Signup and view all the answers

<p>To solve for unknown quantities like acceleration</p> Signup and view all the answers

<p>Gravitational attraction between masses</p> Signup and view all the answers

<p>The Moon's massive momentum makes it resistant to changes in trajectory.</p> Signup and view all the answers

<p>The planet's mass and radius.</p> Signup and view all the answers

<p>The falcon imparts a greater momentum upon impact.</p> Signup and view all the answers

<p>The differential gravitational force between the Earth and Moon.</p> Signup and view all the answers

<p>The state of continuous free fall towards Earth.</p> Signup and view all the answers

<p>It explains the motion of celestial bodies and gravitational phenomena.</p> Signup and view all the answers

<p>It determines the strength of the gravitational force between two objects.</p> Signup and view all the answers

<p>Momentum is directly proportional to velocity.</p> Signup and view all the answers

<p>The object's momentum, which depends on its mass and velocity.</p> Signup and view all the answers

<p>To relate the change in momentum of an object to the force applied over time.</p> Signup and view all the answers

<p>To identify all the forces acting on an object and ensure their vector sum is zero in each direction</p> Signup and view all the answers

<p>The acceleration is determined by the components of the gravitational force acting parallel and perpendicular to the inclined plane</p> Signup and view all the answers

<p>The truck has a greater mass than the motorcycle, resulting in a larger change in momentum</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>The mosquito has a lower momentum, but the falcon has a higher momentum</p> Signup and view all the answers

<p>The microgravity environment of space</p> Signup and view all the answers

<p>The coefficient of friction between the object and the surface</p> Signup and view all the answers

<p>It emphasizes the reciprocal nature of forces between interacting objects, where the forces are always equal in magnitude and opposite in direction</p> Signup and view all the answers

<p>To visualize the direction and magnitude of an object's momentum</p> Signup and view all the answers

<p>The Moon's orbit is primarily governed by the gravitational force of the Earth, which is much stronger than the gravitational forces exerted by the asteroids</p> Signup and view all the answers

<p>Calculating the force exerted and change in momentum</p> Signup and view all the answers

<p>When analyzing forces and momentum in collisions</p> Signup and view all the answers

<p>It ensures that the total linear momentum of an isolated system remains constant</p> Signup and view all the answers

<p>Elastic collisions conserve both momentum and kinetic energy</p> Signup and view all the answers

<p>By decreasing the stopping time for vehicles</p> Signup and view all the answers

<p>Spreading out the force of impact over a longer time</p> Signup and view all the answers

<p>To enhance safety by optimizing force distribution</p> Signup and view all the answers

<p>To illustrate the relationship between initial momentum, final momentum, and the change in momentum</p> Signup and view all the answers

<p>$F_{net} = \frac{\Delta p}{\Delta t}$</p> Signup and view all the answers

<p>The net force determines the magnitude and direction of the change in the object's momentum</p> Signup and view all the answers

<p>To analyze the effects of forces on the motion of objects</p> Signup and view all the answers

<p>The principle of conservation of momentum</p> Signup and view all the answers

<p>Impulse is the change in momentum resulting from a force applied over a time interval</p> Signup and view all the answers

<p>To visualize the forces acting on an object and their magnitudes</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>The truck has a greater mass.</p> Signup and view all the answers

<p>To visualize the magnitude and direction of the momentum change.</p> Signup and view all the answers

<p>The net force is the sum of all the forces acting on the object.</p> Signup and view all the answers

<p>Elastic collisions conserve kinetic energy, while inelastic collisions do not.</p> Signup and view all the answers

<p>The Moon's mass is much greater than the mass of the asteroids.</p> Signup and view all the answers

<p>To determine the net force acting on an object.</p> Signup and view all the answers

<p>The gravitational force.</p> Signup and view all the answers

<p>If the objects are moving in opposite directions, their momenta subtract from each other.</p> Signup and view all the answers

<p>The astronauts are in free fall around the Earth.</p> Signup and view all the answers

<p>To understand the relationship between force, time, and changes in momentum.</p> Signup and view all the answers

<p>Elastic collisions involve no energy transformation, while inelastic collisions involve energy transformation to other forms.</p> Signup and view all the answers

<p>To determine the total momentum of a system before and after a collision.</p> Signup and view all the answers

<p>Newton's Cradle.</p> Signup and view all the answers

<p>Determine the total momentum of the system before the collision.</p> Signup and view all the answers

<p>The truck has a larger mass, resulting in a greater change in momentum.</p> Signup and view all the answers

<p>Momentum vectors must be added or subtracted based on their direction to determine the net momentum.</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>The astronauts are in a constant state of free fall around the Earth.</p> Signup and view all the answers

<p>To visualize the forces acting on an object and their magnitudes.</p> Signup and view all the answers

<p>Linear momentum is directly proportional to the difficulty of stopping a moving object.</p> Signup and view all the answers

<p>To apply conservation laws without external influence</p> Signup and view all the answers

<p>Elastic collisions conserve both momentum and kinetic energy, while inelastic collisions do not.</p> Signup and view all the answers

<p>$p = mv$</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>To show the magnitude and direction of momentum</p> Signup and view all the answers

<p>The lack of gravity in space</p> Signup and view all the answers

<p>The total kinetic energy remains constant before and after the collision.</p> Signup and view all the answers

<p>The acceleration is constant and equal to the acceleration due to gravity (g).</p> Signup and view all the answers

<p>All of the above.</p> Signup and view all the answers

<p>V = Vi + g × t</p> Signup and view all the answers

<p>Joule (J)</p> Signup and view all the answers

<p>S = Vi × t + (1/2) × g × t²</p> Signup and view all the answers

<p>To calculate the work done by a force on an object.</p> Signup and view all the answers

<p>Vf² = Vi² + 2gS</p> Signup and view all the answers

<p>There is a decrease in total kinetic energy after the collision.</p> Signup and view all the answers

<p>A curve</p> Signup and view all the answers

<p>Kinetic energy</p> Signup and view all the answers

<p>Compressing a spring</p> Signup and view all the answers

<p>Having associated potential energies</p> Signup and view all the answers

<p>Potential energy decreases, kinetic energy increases</p> Signup and view all the answers

<p>Friction force</p> Signup and view all the answers

<p>It will remain constant</p> Signup and view all the answers

<p>To calculate the net force acting on an object</p> Signup and view all the answers

<p>It decreases</p> Signup and view all the answers

<p>To relate the change in an object's momentum to the net force acting on it</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>All of the above</p> Signup and view all the answers

<p>Negative work</p> Signup and view all the answers

<p>To visualize and resolve forces acting on an object</p> Signup and view all the answers

<p>The change in the object's kinetic energy</p> Signup and view all the answers

<p>Joules (J)</p> Signup and view all the answers

<p>The kinetic energy remains constant</p> Signup and view all the answers

<p>The object's mass</p> Signup and view all the answers

<p>Positive work increases the object's kinetic energy</p> Signup and view all the answers

<p>By taking the sum of the work done by each force</p> Signup and view all the answers

<p>To calculate the amount of energy transferred between objects</p> Signup and view all the answers

<p>The frequency increases due to wave compression</p> Signup and view all the answers

<p>The frequency decreases</p> Signup and view all the answers

<p>Measuring blood flow speeds</p> Signup and view all the answers

<p>The frequency remains unchanged</p> Signup and view all the answers

<p>The frequency decreases due to wave expansion</p> Signup and view all the answers

<p>It describes the change in frequency due to relative motion</p> Signup and view all the answers

<p>The frequency decreases due to wave expansion</p> Signup and view all the answers

<p>The decrease in frequency of light waves</p> Signup and view all the answers

<p>The changing pitch of a passing siren</p> Signup and view all the answers

<p>It allows for non-invasive monitoring</p> Signup and view all the answers

<p>They alter the total mechanical energy of the system.</p> Signup and view all the answers

<p>$\Delta E_k + \Delta E_p = 0$</p> Signup and view all the answers

<p>By dividing the change in gravitational potential energy by the time taken.</p> Signup and view all the answers

<p>Watt</p> Signup and view all the answers

<p>As the product of the net force acting on the object and its velocity.</p> Signup and view all the answers

<p>The perceived change in frequency or wavelength of a wave due to relative motion between the source and observer.</p> Signup and view all the answers

<p>The observed frequency is equal to the source frequency.</p> Signup and view all the answers

<p>The changing pitch of a passing ambulance siren.</p> Signup and view all the answers

<p>Utilizing a tuning fork and string.</p> Signup and view all the answers

<p>The relative motion between the source and the observer.</p> Signup and view all the answers

<p>Minus (-)</p> Signup and view all the answers

<p>Above 20 kHz</p> Signup and view all the answers

<p>Wavelengths are longer than the emitted wavelengths</p> Signup and view all the answers

<p>Proportional</p> Signup and view all the answers

<p>Moving towards the observer</p> Signup and view all the answers

<p>To determine the speed of celestial objects</p> Signup and view all the answers

<p>'Big Bang' theory</p> Signup and view all the answers

<p>'Microwave Background' radiation</p> Signup and view all the answers

<p>In an elastic collision, both momentum and kinetic energy are conserved, while in an inelastic collision, momentum is conserved but kinetic energy is not.</p> Signup and view all the answers

<p>The truck has a higher kinetic energy due to its greater mass, resulting in a greater impact.</p> Signup and view all the answers

<p>To understand the application of Newton's laws of motion in various scenarios.</p> Signup and view all the answers

<p>The gravitational force between the objects.</p> Signup and view all the answers

<p>To relate the change in momentum of an object to the net force acting on it and the time over which the force is applied.</p> Signup and view all the answers

<p>The cancellation of the gravitational force by the centrifugal force acting on the astronauts.</p> Signup and view all the answers

<p>Lifting an object vertically against gravity</p> Signup and view all the answers

<p>W_net = ΔK = K_f - K_i</p> Signup and view all the answers

<p>Gravity</p> Signup and view all the answers

<p>To understand the conservation of mechanical energy</p> Signup and view all the answers

<p>Conservative forces contribute to the conservation of mechanical energy, while non-conservative forces do not.</p> Signup and view all the answers

<p>It states that energy cannot be created or destroyed in an isolated system.</p> Signup and view all the answers

<p>The work done on an object by a net force results in a change in the object's kinetic energy.</p> Signup and view all the answers

<p>To solve physics problems and understand energy transformations</p> Signup and view all the answers

<p>Gravitational force</p> Signup and view all the answers

<p>The text does not mention the reason for astronaut weightlessness</p> Signup and view all the answers

<p>Zero</p> Signup and view all the answers

<p>It remains constant</p> Signup and view all the answers

<p>The distance over which the force is applied</p> Signup and view all the answers

<p>Zero</p> Signup and view all the answers

<p>Conversion of kinetic energy into thermal energy</p> Signup and view all the answers

<p>102 m</p> Signup and view all the answers

<p>All of the above</p> Signup and view all the answers

<p>2 s</p> Signup and view all the answers

<p>The total momentum before and after a collision is always conserved</p> Signup and view all the answers

<p>Conversion of potential energy into kinetic energy</p> Signup and view all the answers

<p>W = F × d × cos(θ)</p> Signup and view all the answers

<p>To visualize and resolve the forces acting on an object</p> Signup and view all the answers

<p>Net work is equal to the change in kinetic energy</p> Signup and view all the answers

<p>Zero work</p> Signup and view all the answers

<p>Lifting an object vertically upward</p> Signup and view all the answers

<p>Joule (J)</p> Signup and view all the answers

<p>A decrease in kinetic energy</p> Signup and view all the answers

<p>All of the above</p> Signup and view all the answers

<p>To understand the transfer of energy between objects or systems</p> Signup and view all the answers

<p>Net work is the sum of the work done by all forces acting on an object</p> Signup and view all the answers

<p>Non-conservative forces either increase or decrease the total mechanical energy of a system, depending on the work done.</p> Signup and view all the answers

<p>Both gravitational (conservative) and frictional (non-conservative) forces.</p> Signup and view all the answers

<p>$\Delta E_k + \Delta E_p = 0$</p> Signup and view all the answers

<p>Watt (W)</p> Signup and view all the answers

<p>Power = Force × Velocity</p> Signup and view all the answers

<p>The observed frequency is equal to the source frequency.</p> Signup and view all the answers

<p>Visualizing blood flow</p> Signup and view all the answers

<p>It is applicable to both sound and electromagnetic waves.</p> Signup and view all the answers