Answer
The correct answer is:
(b) equal to $g$
Work Step by Step
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 $g$