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Constrained motion of pulley

  1. Oct 9, 2011 #1
    could you please tell me how can the accelaration of masses m1 and m2 can be different.
    i am in a great necessity.so please explain me how can the two strings of the two sides of the lower pulley have different accelarations?

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  2. jcsd
  3. Oct 9, 2011 #2


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    A good start: draw some free-body diagrams.
  4. Oct 9, 2011 #3
    The lower masses have different accelerations due to the fact that the pulley they are attached to is itself moves due to the mass m3. So the mass moving upward will have an augmented acceleration while the mass moving downward will have a diminished acceleration. (Everything being viewed from an inertial frame like the constant surroundings.)
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