Question

part a
the rotational speed of every point of a rotating rigid object ________.
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hint 1.
what is rotational speed?

is zero
is tangent to the circular motion
depends on the distance to the axis of rotation
is the same

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read about rotational speed in section 8.1 in the textbook.

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Explanation:

In a rotating rigid - body, the angular speed (rotational speed) of every point is the same. The linear speed of a point on the rigid object depends on its distance from the axis of rotation ($v = r\omega$, where $v$ is linear speed, $r$ is the distance from the axis of rotation and $\omega$ is the angular speed), but the rotational speed (angular speed) is uniform throughout the object.

Answer:

is the same