## College Physics (4th Edition)

The correct answer is: (b) equal to $g$
The correct answer is: (b) equal to $g$ At the top, the force of air resistance is zero because the velocity is zero. The only force acting on the ball is the gravitational force. We can find the acceleration: $\sum F = ma$ $mg = ma$ $a = g$ The magnitude of the acceleration is equal to $g$