Laws of Motion Quiz

False (B)

A system with no exchange of mass and energy between it and its surroundings.

<p>external forces</p> Signup and view all the answers

<p>Impulse = Product of force and time Isolated System = No exchange of mass and energy Linear Momentum = Mass times velocity Conservation of Momentum = Total momentum remains constant without external force</p> Signup and view all the answers

<p>F = dp/dt (C)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>The total momentum changes.</p> Signup and view all the answers

<p>The force of friction when one body is in motion on another surface. (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>fk = μk R</p> Signup and view all the answers

<p>They act at a single point in the same plane. (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>kinetic friction</p> Signup and view all the answers

<p>Each force must be proportional to the sine of the angle between the other two forces.</p> Signup and view all the answers

<p>It makes it possible to walk. (C)</p> Signup and view all the answers

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

<p>False (B)</p> Signup and view all the answers

<p>Kinetic Friction = Friction during motion between surfaces Static Friction = Friction preventing motion between surfaces Rolling Friction = Friction when a body rolls over another surface Limiting Friction = Maximum static friction before motion occurs</p> Signup and view all the answers

<p>It is the maximum force of static friction just before one body begins to slide. (B)</p> Signup and view all the answers

<p>Wear and tear of machinery</p> Signup and view all the answers

<p>Static friction = Force between surfaces before motion begins Limiting friction = Maximum static friction before sliding starts</p> Signup and view all the answers

<p>The resultant force must be equal to zero.</p> Signup and view all the answers

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

<p>A body in motion continues in a straight line unless acted upon by an outside force. (C), A body remains at rest unless an external force acts upon it. (D)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

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

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

<p>Newton's First Law = A body at rest remains at rest. Newton's Second Law = Force is the rate of change of momentum. Newton's Third Law = Every action has an equal and opposite reaction. Impulsive Force = Force acting for a very short time.</p> Signup and view all the answers

<p>Kilogram meter per second (kg m/s) (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>F = ma</p> Signup and view all the answers

<p>The friction between the car tyre and the road (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>v_{max} = \sqrt{\mu rg}</p> Signup and view all the answers

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

<p>The normal force is equal to the weight of the car. (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

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

<p>Action is equal to reaction (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>The total momentum remains constant.</p> Signup and view all the answers

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

<p>$V = -\frac{mv}{M}$ (C)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>-0.8 m/s</p> Signup and view all the answers

An external push or pull that can change or attempt to change the state of rest or uniform motion of an object.

The resistance of an object to changes in its motion.

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net force.

The product of an object's mass and velocity.

The rate of change of momentum of an object is directly proportional to the net force applied to it.

For every action, there is an equal and opposite reaction.

A force that acts for a very short duration.

The force of gravity acting on an object's mass.

A force that acts on a body for a short period of time, resulting in a significant change in the body's momentum.

The product of the force acting on an object and the duration of time for which the force acts

The change in momentum of an object.

A system that doesn't exchange mass or energy with its surroundings.

The total linear momentum of an isolated system remains constant in the absence of external forces.

The sum of the momenta of all particles in a system.

The product of an object's mass and its velocity.

The force opposing motion between two surfaces in contact when one object is moving over the other.

The maximum force that needs to be overcome to start an object moving from rest.

The ratio of the limiting static friction to the normal force acting on the object.

The ratio of the kinetic friction to the normal force acting on the object.

The force of friction that arises when a body rolls over another.

Friction can be a good thing - essential for everyday activities.

Friction can be harmful, causing wear and tear and reducing efficiency.

Friction is directly proportional to the normal force pressing the two surfaces together.

The total momentum of an isolated system remains constant - the momentum before a collision equals the momentum after the collision.

The velocity of an object after a collision is equal to the total momentum of the system divided by its total mass.

The backward motion experienced by a gun when a bullet is fired.

The formula used to calculate the recoil velocity of a gun, where 'm' is the mass of the bullet, 'v' is the bullet's velocity, and 'M' is the mass of the gun.

Forces acting at the same point on a body.

Forces acting at different points on a body.

Forces that act on a body that's at rest and keep it at rest, or act on a body in motion and keep it moving at a constant speed.

The force that pulls an object towards the center of a circular path.

The outward force that a rotating object exerts on the center of rotation.

The force of friction between the tires of a car and the road provides the centripetal force needed to keep the car moving in a circular path.

The maximum speed a car can safely travel on a curved road before it skids.

The process of tilting a road surface to counteract the centrifugal force on a vehicle traveling in a curved path.

The force that acts perpendicular to the surface of an object, preventing it from sinking into the surface.

The ratio of the force of friction to the normal reaction force.

The force that opposes the motion of an object over a surface.

The overall force acting on an object. It's calculated by adding all the individual forces acting on the object as vectors.

A state where all forces acting on an object balance each other out, resulting in no net movement or acceleration.

Forces that lie in the same plane and act at the same point.

When a point is subjected to multiple forces, it remains stationary (or moves with constant velocity) if the vector sum of the forces is zero.

A relationship between forces in equilibrium where each force is proportional to the sine of the angle between the other two forces. It's a useful tool for analyzing forces in equilibrium.

When forces are balanced, their horizontal and vertical components add up to zero, ensuring no net motion.

A force that opposes the relative motion between two surfaces in contact.

The maximum amount of static friction that can be exerted before an object begins to move.