PHYSICS! -need help!-

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A child pushes tangentially on a small hand driven merry- go- round. She is able to accelerate it from rest to 20 rpm in 10 s. Modeling the merry go round as a uniform disk of radius 3.5 m and mass 800 kg, find the torque required to produce that acceleration. Neglect the frictional torque.

  • PHYSICS! -need help!- -

    now use your text and try to do the problems
    torque = rate of change of angular momentum
    = change in I omega/ change in time

    initial omega = 0
    final omega = 20 *2 pi /60 radians/second

    Your text has a table of moments of inertia of shapes certainly including a solid disk with axis through the center like a wheel.
    This is the last one I will help with. You are not trying.

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