# Mr. King's Chapter 10 Physics Test

20 Questions
• 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.

• E.

• 6.
• A.

Gravity

• B.

The string

• C.

There is no force acting on it

• D.

The can

• E.

• 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.
• 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.

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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