A stone is thrown straight up. When it reaches its highest point,
A) both its velocity and its acceleration are zero.
B) its velocity is zero and its acceleration is not zero.
C) its velocity is not zero and its acceleration is zero.
D) neither its velocity nor its acceleration is zero.
E) neither velocity nor acceleration can be determined without additional information.

Question

Quizplus · Accepted Answer

When the stone reaches its highest point, its velocity is zero because it briefly comes to a stop before starting to fall back down. However, its acceleration is not zero because gravity is still acting on it, causing it to accelerate downwards.

A Stone Is Thrown Straight Up