A bicycle wheel, of radius 0.35 m and mass 3 kg, is rotating at 4.07 rev/s.

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sliceman13

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After 42s it stops due to friction? What is the magnitude of the average torque due to frictional forces?The problem also says that the mass is concentrated on the rim. I know that you have to convert rev/sec to radians/sec, and I tried using the equation torque = (moment of intertia)(angular acceleration). For some reason this doesn't work. Can anyone help me out?
 
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