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# On which of these hills does the ball roll down with ISBN: 9780321909107 29

## Solution for problem 19E Chapter 3

Conceptual Physics | 12th Edition

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Problem 19E

On which of these hills does the ball roll down with increasing speed and decreasing acceleration along the path? (Use this example if you wish to explain to someone the difference between speed and acceleration.)

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Solution 19E In the first hill, the slope of the hill through which the ball is coming down remains constant. So the component of the force along the slope also remains constant. Hence the acceleration of the ball will be constant throughout the motion will remains constant. In the second hill the slope of the surface, through which the ball is coming down, is decreasing. Which means the surface is becoming more horizontal. Now, since the gravitational force is vertical, the component of the force along the surface will decrease. So the acceleration of the ball will also decrease. But, since, the acceleration...

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##### ISBN: 9780321909107

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