# Mr. King's Chapter 10 Physics Test

20 Questions  I  By CGVO

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## Questions and Answers

 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
 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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