A boy, standing at point
A, throws a stone, which travels its path
upto B as shown below.
At the top of its path, the stone has ____.
(A) No acceleration
(B) Acceleration in upward direction
(C) Acceleration in downward direction
(D) Acceleration in horizontal direction
The acceleration should be tangential or 0 I think ,why is it downwards?

The acceleration should be tangential or 0 I think ,why is it downwards?