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Thread: A proportion to gravitational pull.

  1. #1 A proportion to gravitational pull. 
    Forum Freshman
    Join Date
    Apr 2012
    As we all know, if we drop a rock, it would fall towards the center of the earth. Simple gravitation. But I am wondering, wouldn't both masses be falling towards each other?

    We know that even if an object has less mass, it can effect objects with a larger mass. The moon's effect on the earth for example.

    Say you drop a penny. To the observer it seems like the penny merely falls to the ground. However, logically speaking, wouldn't the earth also move towards the penny? Though it would be a tiny change, barely measurable, it still should happen.

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  3. #2  
    Comet Dust Collector Moderator
    Join Date
    Mar 2011
    New Jersey, USA
    Yes, they both fall toward each other. But the mass difference makes the effect of the penny negligible.

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