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Porportional forces?

  1. Oct 15, 2006 #1
    A force is applied to a 1.7kg mass and produces 5.1m/s^2 acceleration.
    what acceleration would be produced by the same force applied to a 8.5kg mass? answer in units of m/s^2

    ok..... would i just use a proportion to get the answer to the problem? 1.7/5.1 = 8.5/x? Or do i need to find the force? If im wrong i would appreciate some guidance in solving this!

  2. jcsd
  3. Oct 15, 2006 #2


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    Your proportion implies F = m / a, which is wrong. F = m * a.
  4. Oct 15, 2006 #3
    oh... ok so it would be 1.7*5.1 =8.5*x
  5. Oct 15, 2006 #4


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    Correct. (1.7*5.1 is your force)
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