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Math Help - mechanics Q16

  1. #1
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    mechanics Q16

    mechanics Q16-123123.gif can anyone q.16 only the part where we have to prove that x is greater than or equal to
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  2. #2
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    Re: mechanics Q16

    for masses A & B to accelerate ...

    T > 2mg\sin{\theta}

    mg > T

    using these two inequalities, you should be able reach the first conclusion in the problem statement.


    for the second conclusion, start with net force equations for each mass ...

    T - 2mg\sin{\theta} = 2ma

    mg - T = ma

    ---------------------------- combine ...

    mg - 2mg\sin{\theta} = 3ma

    solve for acceleration ...

    a = \frac{g(1-2\sin{\theta})}{3}

    ... remember that this acceleration is only applicable for a displacement of magnitude x for both masses.


    now, you finish it.
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  3. #3
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    Re: mechanics Q16

    oh man i told u just the last part i solved this all but couldnt solve last part
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