physics

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If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at 0.72 {\rm rev}/{\rm s}, friction in the bearings causes the wheel to stop
in just 12 {\rm s}.

  • physics -

    That may be true for this specific bicycle, but you have not asked a question.

    You also need to explain the symbol
    {\rm

  • physics -

    If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at 0.72rev/s, friction in the bearings causes the wheel to stop
    in just 12s.

    Part A
    If the moment of inertia of the wheel about its axle is 0.30kg\m2 , what is the magnitude of the frictional torque?

  • physics -

    0.11 N*m

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