Quiz 7: Rotational Kinetic Energy

10 Questions | Total Attempts: 288

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Kinetic Energy Quizzes & Trivia

Questions and Answers
  • 1. 
    When playing billiards, the collisions between the balls are best described as __________________.
    • A. 

      Elastic

    • B. 

      Inelastic

    • C. 

      Expensive

    • D. 

      Exhaustive

  • 2. 
    If two objects collide with each other, _______________.
    • A. 

      The sum of their momentums after the collision is equal to the sum of their momentums before the collision

    • B. 

      The momentum before the collision is always greater than the total momentum after the collision

    • C. 

      The object with greater mass always has greater momentum

    • D. 

      They both lose momentum at the moment of impact

  • 3. 
    Momentum is the product of ___________.
    • A. 

      Mass times velocity

    • B. 

      Force times distance

    • C. 

      Speed times acceleration

    • D. 

      Time and space

  • 4. 
    The kinetic energy of an object will increase the most if you __________________.
    • A. 

      Double the velocity of the object

    • B. 

      Double the mass of the object

    • C. 

      Double the potential energy

    • D. 

      Double the temperature of the object

  • 5. 
    A person jumps to the ground from a platform 10 feet high.  Which of the following is true?
    • A. 

      The person has more kinetic energy before they jump than after they jump.

    • B. 

      The person has less potential energy at the top of the platform than in the air.

    • C. 

      The person's potential energy at the instant they jump is approximately equal to their kinetic energy the instant they land.

    • D. 

      The person's kinetic energy at the instant they jump is approximately double their potential energy the instant they land.

  • 6. 
    You have 3 round objects of equal mass and equal radius, but different shapes.  Which of the following shapes will have the largest moment of inertia?
    • A. 

      A hollow ring

    • B. 

      A solid disk

    • C. 

      A solid sphere

    • D. 

      They are all equal

  • 7. 
    A round object is at the top of a hill.  Assuming that friction does not slow it down at all, will it go down the hill faster if it just slides down without rotating, or if it rolls down?
    • A. 

      Sliding

    • B. 

      Rolling

    • C. 

      If friction doesn't slow it down, then they are the same

    • D. 

      It depends on whether or not the object is hollow

  • 8. 
    You take an object of irregular shape and draw a big, red dot right on its center of mass.  What path will the red dot trace out if you throw the object spinning through the air?
    • A. 

      A parabola

    • B. 

      A half-circle

    • C. 

      An irregular path since the object is not perfectly round

    • D. 

      You can't tell unless you know how fast the object is spinning

  • 9. 
    A ball rolls down a hill.  The potential energy of the ball at the top of the hill is equal to...
    • A. 

      The translational kinetic energy plus the rotational kinetic energy at the bottom of the hill

    • B. 

      1/2 mv^2 at the bottom of the hill

    • C. 

      It depends on the radius of the ball

    • D. 

      Less than 1/2 mv^2 at the bottom of the hill

  • 10. 
    is the formula for:
    • A. 

      Moment of inertia

    • B. 

      Rotational kinetic energy

    • C. 

      Total kinetic energy of a moving object

    • D. 

      Potential energy of rotation

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