Explanation Let us find the acceleration of the Earth and the object assuming the mass of the freely falling object to be m = 1 kg. If the mass of the Earth is M, then the acceleration of the Earth would be found using Newton’s laws of motion. Acceleration of free falling object will be mg= 9.8m/s 2 From Newton’s third law of motion that every action has an equal and opposite reaction, Force on the Earth is: F E a r t h = F o b j e c t M × a E a r t h = m g

7th Edition

ISBN: 9780321625922

Author: Douglas C. Giancoli

Publisher: Addison-Wesley

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!

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Chapter 4, Problem 12Q

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Does the Earth move when we exert a force on it.

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Physics: Principles with Applications

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