ch15-p084 - 84. (a) The rotational inertia of a hoop is I =...

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ω == k mR r r R k m 22 / . (b) If r = R the result of part (a) reduces to = km /. (c) And if r = 0 then = 0 (the spring exerts no restoring torque on the wheel so that it is not brought back towards its equilibrium position). 84. (a) The rotational inertia of a hoop is I = mR 2 , and the energy of the system becomes EI k x =+ 1 2 1 2 and θ is in radians. We note that r = v (where v
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