When a rock thrown straight upwards gets to the exact top of its path,its
A)velocity is zero and its acceleration is zero.
B)velocity is zero and its acceleration is about 10 meters per second per second.
C)velocity is about 10 m/s and its acceleration is zero.
D)velocity is about 10 m/s and its acceleration is about 10 meters per second per second.
E)none of these

Question

Quizplus · Accepted Answer

At the top of its path, the velocity of the rock is zero because it changes direction. However, the acceleration due to gravity is still acting on it, which is approximately 10 meters per second squared (or 9.8 m/s²).

When a Rock Thrown Straight Upwards Gets to the Exact