If a cannonball is fired from a tall mountain, gravity changes its speed all along its trajectory.

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If a cannonball is fired from a tall mountain, gravity changes its speed all along its trajectory. But if it is fired fast enough to go into circular orbit, gravity does not change its speed at all. Explain.

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Conceptual Physics

ISBN: 978-0321568090

11th edition

Authors: Paul G. Hewitt

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Question Posted: Mar 25, 2016 05:39 AM

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If a cannonball is fired from a tall mountain, gravity changes its speed all along its trajectory.

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Gravity changes the speed of a cannonball when the cannonball moves in the direction of Earth ...View the full answer

Conceptual Physics

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