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Homework Help: Help with basic physics prob

  1. Oct 7, 2004 #1
    Which pulls harder gravitationally? the earth on the moon, or the moon on the
    earth? Which accelerated more?

    i know this is easy, but dont they pull the same, and accelerate the same?
  2. jcsd
  3. Oct 7, 2004 #2
    If you used the formula F = G M1 M2 / R^2 tell me what does F represent

    does F represent the force earth exerts on the moon or the moon exerts on earth or both??
  4. Oct 8, 2004 #3


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    Homework Helper

    Newton's Third Law gives you the answer to the first part - they pull at each other with equal force. For the second part, ask yourself if the same force is applied to two objects which will undergo the greater acceleration - the more massive object or the less massive object?
  5. Oct 8, 2004 #4
    so they pull the same, but the moon will accelerate more because it has a smaller masss
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