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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

A juggler throws a bowling pin straight up in the air. After the pin leaves his hand and while it is in the air, which statement is true? (a) The velocity of the pin is always in the same direction as its acceleration. (b) The velocity of the pin is never in the same direction as its acceleration. (c) The acceleration of the pin is zero. (d) The velocity of the pin is opposite its acceleration on the way up. (e) The velocity of the pin is in the same direction as its acceleration on the way up.

To determine
The true statement regarding a ball which is juggled.

Explanation

The ball is mobbing under gravity when it moves upward and downward. The magnitude of the acceleration of the ball when it moves upward and downward is equal to the acceleration due to gravity. The direction will be negative when the ball moves upward and the direction will be positive when the ball moved downward.

Conclusion:

The acceleration of the ball is negative when it moves upward. The ball slows down due to negative acceleration because the acceleration is against the velocity of the ball. Therefore, option (d) is true.

When the ball moves up, the velocity of the ball is upward. However, the acceleration of the ball is downward...

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