Mr. King's Chapter 10 Physics Test

20 Questions  I  By CGVO
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  • 1. 
    Which has greater linear speed, a horse near the outside rail of a merry-go round or a horse near the inside rail?
    • A. 

      The inside horse

    • B. 

      The outside horse

    • C. 

      Neither-- they both have the same linear speed


  • 2. 
    Which has greater angular speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?
    • A. 

      Neither-- they both have the same angular speed

    • B. 

      The inside horse

    • C. 

      The outside horse


  • 3. 
    What is the direction of the force that acts on clothes in the spin cycle of a washing machine?
    • A. 

      Inward

    • B. 

      Down

    • C. 

      Outward

    • D. 

      Up


  • 4. 
    A tin can whirled on the end of a string moves in a circle because
    • A. 

      The can continually pulls on the string

    • B. 

      Once the can starts moving, that is its natural tendency

    • C. 

      There is a force on the can pulling it outward

    • D. 

      There is an inward force acting on the can

    • E. 

      All of the above


  • 5. 
    If you whirl a tin can on the end of a string and the string suddenly breaks, the can will
    • A. 

      Fly directly away from you

    • B. 

      Fly off, tangent to its circular path

    • C. 

      Fly directly toward you

    • D. 

      Spiral in toward your hand

    • E. 

      Spiral away from your hand


  • 6. 
    A lady bug rests on the bottom of a tin can that is being whirled horizontally on the end of a string. Since the ladybug, like the can, moves in a circle, there must be a force on it. What exerts this force?
    • A. 

      Gravity

    • B. 

      The string

    • C. 

      There is no force acting on it

    • D. 

      The can

    • E. 

      Your hand


  • 7. 
    People in the future may well live inside a rotating space structure that is more than 2 km in diameter. Inside the structure, people on the inside of the outer edge will experience 1 g while people halfway to the axis will experience 
    • A. 

      2 g

    • B. 

      1 g

    • C. 

      1/2 g

    • D. 

      1/4 g

    • E. 

      0 g


  • 8. 
    "Centrifugal forces" are an apparent reality to observers in a reference frame that is 
    • A. 

      Rotating

    • B. 

      An inertial reference frame

    • C. 

      Moving at constant velocity

    • D. 

      At rest

    • E. 

      None of the above


  • 9. 
    As the rotational speed of a space habitat increases, the weight of people inside
    • A. 

      Decreases

    • B. 

      Increases

    • C. 

      Stays the same


  • 10. 
    A car travels in a circle with constant speed. The net force on the car
    • A. 

      Is zero because the car is not accelerating

    • B. 

      Is directed forward, in the direction of travel

    • C. 

      Is directed toward the center of the curve

    • D. 

      None of the above


  • 11. 
    If Earth rotated more slowly about its axis, your weight would 
    • A. 

      Decrease

    • B. 

      Increase

    • C. 

      Stay the same


  • 12. 
    A possible space habitat of the future is a cylinder in space rotating about its long axis. What is the relative gravitational field along the axis of the habitat?
    • A. 

      1/4 g

    • B. 

      1/2 g

    • C. 

      3/4 g

    • D. 

      G

    • E. 

      Zero


  • 13. 
    When a railroad train rounds a banded track, the centripetal force needed comes not from friction, but from the 
    • A. 

      Vertical component of the normal force

    • B. 

      Horizontal component of the normal force

    • C. 

      Normal force

    • D. 

      None of the above


  • 14. 
    The centripetal force exerted on stunt motorcyclist Biker Bob while riding on the inner vertical surface of a circular track is
    • A. 

      Triction

    • B. 

      His weight

    • C. 

      The normal force

    • D. 

      None of the above


  • 15. 
    Nellie Newton swings a rock into a circular path while holding an attached string overhead. The string makes a 45-degree angle to the vertical (compromising a "conical pendulum") the centripetal force that holds the rock in its circular path is the 
    • A. 

      Vertical component of the string tension

    • B. 

      Horizontal component of the string tension

    • C. 

      Tension in the string

    • D. 

      None of the above


  • 16. 
    Stunt motorcyclist Biker Bob rides his bike inside a futuristic rotating space station- a giant rotating doughnuts- shaped structure in space. The normal support force feels like weight to him. As he rides his bike in the same direction that the station rotates, the normal force
    • A. 

      Remains unaffected

    • B. 

      Increases

    • C. 

      Decreases


  • 17. 
    Stunt motorcyclist Biker Bob rides his bike inside a futuristic rotating space station-- a giant rotating doughnut-shaped structure in space. The normal support force feels like weight to  him. As he rides his bike in the opposite direction to the station's rotation, the normal force
    • A. 

      Remains unaffected

    • B. 

      Increases

    • C. 

      Decreases


  • 18. 
    A space habitat is designed so that the variation in g between a perso's head and feet is less than 0.01 g. If the person is 2 m tall, the the radius of the habitat is
    • A. 

      20 m

    • B. 

      200 m

    • C. 

      2000 m

    • D. 

      More than 2000 m


  • 19. 
    A game room in a rotating space habitat is located in a 0.25 g region. If a person can jump 0.5 m high in a 1 g region, how high can the same person jump in the game room
    • A. 

      0.5 m

    • B. 

      2 m

    • C. 

      4 m

    • D. 

      8 m

    • E. 

      More than 8 m


  • 20. 
    Earth rotates and revolves through space. Earth rotates about the ___, which is an ___ axis. Earth revolves about the ___, which is an ___ axis. 
    • A. 

      Sun, external, North/South pole, internal

    • B. 

      North/South pole, external, sun, internal

    • C. 

      Sun, internal, North/South pole, external

    • D. 

      North/South pole, internal, sun, external


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