The angular acceleration versus time for an object undergoing circular motion is shown in the figure below.If the object started from rest at t = 0 s,the net angular velocity of the object at t = t_f is A)in the clockwise direction. B)in the counter-clockwise direction. C)zero. D)The angular velocity cannot be determined.

Question

Quizplus · Accepted Answer

The angular acceleration graph is a straight line passing through the origin, indicating a constant angular acceleration. Therefore, the angular velocity versus time graph will be a parabolic curve. At the point in time t = t_f, the angular acceleration is zero, which means that the angular velocity of the object has reached its maximum value and is no longer changing. Therefore, the net angular velocity of the object at t = t_f is zero, so the correct answer is C.

The Angular Acceleration Versus Time for an Object Undergoing Circular