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Math Help - brain freeze on this

  1. #1
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    brain freeze on this

    A mass of 0.5 kg is suspended from a flywheel as shown in FIGURE 2. If the mass is released from rest and falls a distance of 0.5 m in 1.5 s, calculate:
    (a) The linear acceleration of the mass.
    (b) The angular acceleration of the wheel.
    (c) The tension in the rope.
    (d) The frictional torque, resisting motion.
    brain freeze on this-fig-1.png
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  2. #2
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    Re: brain freeze on this

    For part (a), a helpful initial step would be to calculate the average speed. Can you do that? v_avg = total distance traveled/time. After you have calculated that, ponder on how the following formula may be of some advantage: v_{avg} = \frac{v_f + v_i}{2}
    Last edited by Bashyboy; February 22nd 2013 at 01:32 PM.
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  3. #3
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    Re: brain freeze on this

    Of the variables in the average velocity formula, which variables do you know? You certainly know a_avg, because I told you to calculate it. Are there anymore, besides this one?
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  4. #4
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    Re: brain freeze on this

    v_avg = 0.15 m/s2

    v_f = v_avg X 2 => 0.3m/s2

    still lost from here sorry
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