Starting from rest,a wheel undergoes constant angular acceleration for a period of time T.At which of the following times does the average angular acceleration equal the instantaneous angular acceleration?
A)0.50T
B)0.67T
C)0.71T
D)all of the above

Question

Quizplus · Accepted Answer

The average angular acceleration over a time interval is given by:

average angular acceleration = change in angular velocity / time interval

During the constant angular acceleration period, the instantaneous angular acceleration is constant, so it is equal to the average angular acceleration at all times. Therefore, the answer is all of the above: 0.50T, 0.67T, and 0.71T.

Starting from Rest,a Wheel Undergoes Constant Angular Acceleration for a Period