Vertical Motion and Free Fall Video Lessons

Concept

# Problem: 7. When a rock thrown straight upwards gets to the exact top of its path, its A) velocity is zero and its acceleration is about 10 meters per second per second. B) velocity is about 10 m/s and its acceleration is about 10 meters per second per second. C) velocity is zero and its acceleration is zero. D) velocity is about 10 m/s and its acceleration is zero. E) none of these

###### FREE Expert Solution

7.

The top of the path is the maximum height.

At maximum height, the rock stops for an instant, so velocity is zero.

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###### Problem Details

7. When a rock thrown straight upwards gets to the exact top of its path, its

A) velocity is zero and its acceleration is about 10 meters per second per second.

B) velocity is about 10 m/s and its acceleration is about 10 meters per second per second.

C) velocity is zero and its acceleration is zero.

D) velocity is about 10 m/s and its acceleration is zero.

E) none of these