physics homework help

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Your friend claims the Moon is not falling toward the Earth.  Please explain why your friend is incorrect?  Since the moon is falling toward the Earth, why doesn’t it hit the Earth?

Jun 1st, 2015

Moon is in orbit around the Sun (as well as in orbit around the Earth). Another way of looking at it is that the center of gravity of the Earth-Moon system is revolving around the Sun, and the Earth and the Moon are revolving around their common center of gravity. The Sun is pulling on the Moon, but the Earth is "falling" right along with it, so they stay together.

 Earth just sits there and rotates. It doesn't move. So the moon and the rock are two objects, but the rock is smaller and has no gravitational force. 


Jun 1st, 2015

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Jun 1st, 2015
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Jun 1st, 2015
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