# Conceptual Physics: Questions On Rotational Motion

61 Questions | Attempts: 2655  Settings  .

• 1.
Horses that move with the fastest linear speed on a merry-go-round are located
• A.

Near the center

• B.

Near the outside

• C.

Anywhere, because they all move at the same speed

• 2.
Your pet hamster sits on a record player whose angular speed is constant. If he moves to a point twice as far from the center, then his linear speed
• A.

Doubles

• B.

Halves

• C.

Remains the same

• 3.
Since each rolling wheel of a railroad train is tapered, the narrow part of the wheel has a tangential speed that is
• A.

Greater than that of the wide part

• B.

Smaller than that of the wide part

• C.

The same as that of the wide part

• 4.
When a train makes a curve, different parts of the wheel rims
• A.

Cover a different distance in the same time

• B.

Must all expand at the same time

• C.

Must all contract at the same time

• D.

Vibrate at different rates

• 5.
The tapered shape of the parts of the wheels that ride on railroad tracks allows opposite wheels to
• A.

In effect, vary their diameters

• B.

Travel at different linear speeds for the same rotational speed

• C.

Both A and B are correct

• 6.
Which moves faster in m/s on a merry-go-round: a horse on the inside or a horse on the outside near the outer rail?
• A.

Inside horse

• B.

Outside horse

• C.

Both move at the same speed in m/s

• 7.
If a turntable's rotational speed is doubled, then the linear speed of a pet hamster sitting on the edge of the record will
• A.

Double

• B.

Double

• C.

Remain the same

• 8.
Suppose the circumference of a bicycle wheel is 2 meters. If it rotates at 1 revolution per second when you are riding the bicycle, then your speed will be
• A.

1 m/s

• B.

2 m/s

• C.

3 m/s

• D.

3.14 m/s

• E.

6.28 m/s

• 9.
Consider a string with several rocks tied along its length at equally spaced intervals. You whirl the string overhead so that the rocks follow circular paths. Compared to a rock in the middle of the string, a rock at the outer end moves
• A.

Half as fast

• B.

Twice as fast

• C.

At the same linear speed

• 10.
A broom is easier to balance on its end when the heavier end (the brush end) is
• A.

• B.

• C.

Same either way

• 11.
An industrial flywheel has a greater rotational inertia when most of its mass is
• A.

Nearest the rim

• B.

Nearest the axis

• C.

Uniformly spread out as in a disk

• 12.
A coin and a ring roll down an incline starting at the same time. The one to reach the bottom first will be the
• A.

Ring

• B.

Coin

• C.

Both reach the bottom at the same time

• 13.
The rotational inertia of your leg is greater when your leg is
• A.

Straight

• B.

Bent

• C.

Same either way

• 14.
A torque acting on an object tends to produce
• A.

Equilibrium

• B.

Rotation

• C.

Linear motion

• D.

Velocity

• E.

A center of gravity

• 15.
On a balanced seesaw, a boy three times as heavy as his partner sits
• A.

1/3 the distance from the fulcrum

• B.

Less than 1/3 the distance from the fulcrum

• C.

More than 1/3 the distance from the fulcrum

• 16.
Put a pipe over the end of a wrench when trying to turn a stubborn nut on a bolt, to effectively make the wrench handle twice as long, you'll multiply the torque by
• A.

Two

• B.

Four

• C.

Eight

• 17.
Toss a baseball bat into the air and it wobbles about its
• A.

Geometrical center

• B.

Center of mass

• C.

Heavier end

• 18.
The long, heavy tail of a spider monkey enables the monkey to easily vary its
• A.

Weight

• B.

Momentum

• C.

Inertia

• D.

Center of gravity

• E.

None of these

• 19.
The center of mass of a human body is located at a point
• A.

That is fixed, but different for different people

• B.

That is always directly behind the belly button

• C.

That changes as a person bends over

• D.

None of these

• 20.
The famous Leaning Tower of Pisa doesn't topple over because its center of gravity is
• A.

Above a place of support.

• B.

Relatively low for such a tall building.

• C.

Stabilized by its structure.

• D.

Displaced from its center.

• E.

In the same place as its center of mass.

• 21.
The chef at the infamous Fattening Tower of Pizza tosses a spinning disk of uncooked pizza dough into the air. The disk's diameter increases during the flight, while its rotational speed
• A.

Remains constant.

• B.

Increases.

• C.

Decreases.

• 22.
Centrifugal forces are an apparent reality to observers in a reference frame that is
• A.

Moving at constant velocity.

• B.

An inertial reference frame.

• C.

At rest.

• D.

Rotating.

• E.

None of these

• 23.
A person weighs less at the equator than at the poles. The main reason for this has to do with
• A.

The spin of the Earth.

• B.

The shape of the Earth.

• C.

The influence of the sun, moon, and all the planets.

• D.

The law of action and reaction.

• 24.
When a twirling ice skater brings her arms inward, her rotational speed
• A.

Increases.

• B.

Decreases.

• C.

Remains the same.

• 25.
Consider a rotating donut-shaped space habitat where living quarters are on the inside surface farthest from the axis. If the rotational speed of the habitat increases, the apparent weight of people inside
• A.

Increases.

• B.

Decreases.

• C.

Stays the same.

• D.

Is always zero.

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