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    Two packets P and Q are connected by a rope which passes over a smooth fixed pulley. P has mass 4kg and Q has mass Mkg where M > 4. The system is released from rest with the string taut. The initial acceleration of each particle is 3ms.

    Calculate
    (a) The initial tension

    I found this to be 51.2N

    (b) The value of M

    7.53

    (c) The initial force exerted by the rope on the pulley..
    Given that during the first 2s of the motion neither particle emets any obstruction,
    (d)calculate the distance moved by P during the first 2s

    Any help on the last 2 parts of this question is very much appreciated guys!
    Tut
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    c) 2T= 2 x 51.2=102.4 N

    d) u=0 t=2 s=? a=?

    Work out the acceleration via F=ma then sub in the values into the suvat equation s=ut +[at^2]/2
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    Here is my solution.
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Updated: November 17, 2005

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