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</p> Signup and view all the answers

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

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

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

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

    What distinguishes displacement from distance?

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

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

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

    What launch angle provides projectiles with the longest horizontal range?

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

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