Question

Can a body have zero velocity and still be accelerating?

Answer 1

1. Yes, that is possible. When the acceleration and velocity are moving in opposite directions, this condition can be reached. When a ball is thrown vertically upward and gravitational acceleration is acting downwards.
2. The ball's velocity is zero at its greatest point of flight, but it still accelerates owing to gravity.

1. The Earth's surface gravity causes the ball to always accelerate downhill at a rate of around $9.8\mathrm{m}/{\mathrm{s}}^2$ while it is in the air.
2. The ball's velocity shifts from positive to negative due to this acceleration.
3. As a result, at the extreme points, its velocity is zero, yet it accelerates.