   Chapter 2.4, Problem 2.6QQ

Chapter
Section
Textbook Problem

A tennis player on serve tosses a ball straight up. While the ball is in free fall, does its acceleration (a) increase, (b) decrease, (c) increase and then decrease, (d) decrease and then increase, or (e) remain constant?

To determine
The acceleration of the ball.

Explanation

The acceleration of freely falling object is equal to the acceleration due to gravity. The magnitude of acceleration due to gravity is 9.81m/s2 .

Conclusion:

After reaching the maximum height, the velocity of the ball becomes zero. From the maximum height, the ball starts falling under the effect of gravity. The only force acting on the ball will be gravitational attraction and the acceleration of the ball will be equal to the acceleration due to gravity, which has a constant value of 9.81m/s2 . Thus, the choice (e) is correct.

After reaching the maximum height, the acceleration of the ball is the acceleration due to gravity

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