A Wheel Is Rotated About a Horizontal Axle at a Constant

Multiple Choice

A wheel is rotated about a horizontal axle at a constant angular rate. Next, it is rotated in the opposite direction with the same angular rate. The acceleration at a point on the top of the wheel in the second case as compared to the acceleration in the first case:

A) is in the same direction.
B) is in the opposite direction.
C) is upward.
D) is tangential to the wheel.