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Wheel attached to a fixed shaft

  1. Oct 16, 2011 #1
    1. The problem statement, all variables and given/known data

    A wheel is attached to a fixed shaft, and the system is free to rotate without friction. To measure the moment of inertia of the wheel-shaft system, a tape of negligible mass wrapped around the shaft is pulled with a known constant force F. When a length L of tape has unwound, the system is rotating with angular speed w(omega)0. Find the moment of inertia of the system, I0.

    2. Relevant equations

    3. The attempt at a solution
    Please help me... I don't have any idea. Except Answer clue: if F=10N, L=5m, w(omega)0=0.5rad/s, then I0=400 kg*m^2
  2. jcsd
  3. Oct 16, 2011 #2
    Think about work/energy relationships. What have you studied about work, potential energy, and kinetic energy?
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