Ten seconds after an electric fan is turned on, the fan rotates at 300 rev/min.Its average angular acceleration is: A)3.14 rad/s² B)30 rad/s² C)30 rev/s² D)50 rev/min² E)1800 rev/s²

Question

Quizplus · Accepted Answer

The average angular acceleration can be calculated using the formula: angular acceleration = (final angular velocity - initial angular velocity) / time. Since the fan reaches 300 rev/min (which is 300/60 = 5 rev/s or 5*2π = 10π rad/s) in 10 seconds, starting from rest (0 rad/s), the average angular acceleration is (10π - 0) / 10 = π rad/s^2, which is approximately 3.14 rad/s^2.

Ten Seconds After an Electric Fan Is Turned On, the Fan