Question 1

Which statement is INCORRECT about angular quantities?

Accepted Answer

An angle in radians is the ratio of the circumference to the radius.

Answer

Objects farther from the axis of rotation will move faster.

Answer

The angular acceleration is the rate at which the angular velocity changes with time.

Answer

Rotational quantities describe the rotation of an object about a given axis.

Question 2

Which statement is correct about rotational quantities?

Accepted Answer

An angle in radians is a pure number and without dimensions.

Answer

An axis does change direction relative to the frame.

Answer

Angular velocity and linear velocity have the same dimensions.

Answer

Every part of a rotating rigid body has the different angular velocity.

Question 3

A 0.350 m radius car tire is traveling at 12.0 m/s. What is the angular velocity of the car tire?

Accepted Answer

34.3 rad/s

Answer

54.3 rad/s

Answer

64.3 rad/s

Answer

24.3 rad/s

Question 4

If the car tire in the previous item becomes larger as 0.500 m radius, what is the angular velocity?

Accepted Answer

24 rad/s

Answer

36 rad/s

Answer

14 rad/s

Answer

18 rad/s

Question 5

An ice skater spins with her arms folded. What happens to her angular velocity as she extends her arms outward?

Accepted Answer

Decrease

Answer

Becomes zero

Answer

Does not change

Answer

Increase

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