   Chapter 2.4, Problem 2.7QQ

Chapter
Section
Textbook Problem

As the tennis ball of Quick Quiz 2.6 travels through the air, does its speed (a) increase, (b) decrease, (c) decrease and then increase, (d) increase and then decrease, or (c) remain the same?

To determine
The speed of the ball.

Explanation

The acceleration of the object when it is moving upward under the gravity is equal to the acceleration due to gravity. However, the direction of the acceleration will be opposite to the direction of motion which slows down the object. 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:

The velocity of the ball decreases while it moves upward since the acceleration due to gravity acts against the motion. The negative acceleration slows down the ball. The velocity of the ball becomes zero at the maximum height. From the maximum height, the ball starts falling under the effect of gravity. The acceleration due to gravity helps to increase the ball’s velocity from zero to the maximum height just before it hits the ground. Thus, the choice (c) is correct

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts 