Andy and Charlie are riding a merry-go-round. Andy rides at a point on the outer

Question

Andy and Charlie are riding a merry-go-round. Andy rides at a point on the outer rim of the circular platform, three times farther from the center than Charlie is riding. When the merry-go-round is rotating at constant angular speed, which one of the following statements is correct?

A) Andy has zero angular acceleration

B) Andy has zero angular momentum

C) The angular speed of Andy is three time that of Charlie

D) The angular speed of Andy is nine times that of Charlie

E) The angular acceleration of Andy is nine times that of Charlie

Explanation / Answer

Only statement A is correct.

Here is the explanation.

In a rigid body while rotating all the points have same angular speed and angular acceleration.

and when a body rotates with constant angular speed, then its angular acceleration is zero.

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