Question

A ball is thrown straight up. What is its velocity and acceleration at the top?

Answer 1

1. At the highest point, the ball is stopped, as the ball is stopped there for some time, the velocity will become zero.
2. For the acceleration, as the ball is thrown as and then moving down with the virtue of acceleration due to gravity, the acceleration due to gravity works as the acceleration.
3. It can be concluded that, when the ball is thrown straight up, the velocity at the highest point is zero. As, at that position, it stops for a moment, and here, gravity works as acceleration.

So, the velocity at the top is zero and the acceleration at the top is $9.8{\mathrm{ms}}^{-2}$ in the downward direction.