Physics Concepts in Kinematics and Dynamics
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Questions and Answers

What happens to the kinetic energy of an object if its velocity is doubled?

  • The kinetic energy remains the same
  • The kinetic energy doubles
  • The kinetic energy quadruples (correct)
  • The kinetic energy is halved

If an object is lifted to a greater height, what primarily affects its potential energy?

  • The height above a reference point (correct)
  • The distance traveled
  • The mass of the object
  • The velocity of the object

Which statement about momentum is true?

  • Momentum is always positive.
  • Momentum is conserved during collisions. (correct)
  • Momentum is a scalar quantity.
  • Momentum equals mass divided by velocity.

How is momentum calculated?

<p>Momentum = mass × velocity (D)</p> Signup and view all the answers

What is the net force acting on an object moving at constant velocity?

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

In the context of impulse and momentum, what does a longer time to change momentum result in?

<p>Lower force on impact (A)</p> Signup and view all the answers

What effect does inertia have on an object's mass?

<p>Inertia is a measure of mass (D)</p> Signup and view all the answers

What happens to the potential energy of an object if its mass is doubled?

<p>Potential energy doubles (C)</p> Signup and view all the answers

What distinguishes displacement from distance?

<p>Displacement includes direction, whereas distance is a scalar quantity without direction. (D)</p> Signup and view all the answers

What does the slope of a displacement vs. time graph represent?

<p>The velocity of the object. (C)</p> Signup and view all the answers

What happens to the vertical velocity of a projectile as it reaches its highest point?

<p>Vertical velocity becomes zero at the highest point. (B)</p> Signup and view all the answers

What is the effect of increasing the initial vertical velocity on the height of a projectile?

<p>It increases the height achieved. (B)</p> Signup and view all the answers

When a bullet is dropped and another is fired horizontally from the same height, which one hits the ground first?

<p>The bullet dropped hits the ground first. (D)</p> Signup and view all the answers

What is the horizontal component of velocity for a projectile launched at an angle?

<p>It is constant throughout the projectile's flight. (A)</p> Signup and view all the answers

What launch angle provides projectiles with the longest horizontal range?

<p>45 degrees. (C)</p> Signup and view all the answers

What is the acceleration of an object in free fall, ignoring air resistance?

<p>9.8 m/s² downward. (C)</p> Signup and view all the answers

Flashcards

Kinetic Energy

The energy an object possesses due to its motion.

Potential Energy

The energy an object possesses due to its position relative to a reference point.

Power

The rate at which work is done or energy is transferred.

Conservation of Energy

The total energy of a closed system remains constant; energy can be transformed from one form to another.

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Inertia

The measure of an object's resistance to changes in its motion.

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Net Force

The sum of all forces acting on an object.

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Momentum

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

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Impulse

The change in momentum of an object.

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Displacement

The change in position of an object, measured with both magnitude and direction.

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Displacement vs. Time graph

A graph plotting the object's position at different times.

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Velocity vs. Time graph

A graph plotting the object's velocity (speed and direction) at different times.

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Velocity

The rate of change of displacement; how quickly an object's position is changing.

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Acceleration

The rate of change of velocity; how quickly an object's speed or direction is changing.

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Vector Components

Breaking down a vector (force, velocity) into its horizontal and vertical components.

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Range of a Projectile

The maximum horizontal distance a projectile travels.

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Time of Flight

The time it takes for a projectile to travel from launch to landing.

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