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Homework Help: Newtons Law

  1. Oct 4, 2007 #1
    Consider three bodies with mass m0 m1 and m2 at rest on a frictionless surface. When we insert a compressed spring between bodies 0 and 1 and release the spring we notice that the magnitudes of their accelerations are related by: a1=4a0. When we do the same experiment with bodies 0 and 2 we find: a2=a0/3. What is the ratio of m2/m1?

    Can anyone tell me how i should start this question?
  2. jcsd
  3. Oct 4, 2007 #2
    Start finding the ratios m0/m1 and m0/m2
  4. Oct 4, 2007 #3
    what do you mean?
  5. Oct 4, 2007 #4

    Doc Al

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    Staff: Mentor

    When the springs are released and the bodies fly apart, what physical quantity is conserved?

    Alternatively, from a Newton's laws perspective, when two bodies fly apart what can you say about the force exerted on each body by the spring?
    Last edited: Oct 4, 2007
  6. Oct 4, 2007 #5
    One object will be sent to the left and the other object will be sent out to the right. momentum would be conserved in this closed system..
  7. Oct 4, 2007 #6


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    Homework Helper

    yes. and the force on each mass attached to the spring is the same. use the fact that the forces are the same to get the ratio of m0/m1 and m0/m2.
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