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    Can anybody manage to do this question?

    A uniform disc of mass m and radius a, rotating at an angular speed w is placed on a flat horizontal surface. If the coefficient of friction is u, calculate the frictional torque on the disc and hence the time it takes for it to come to rest.

    Cheers in advance,

    Chris
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    (Original post by chrisbphd)
    Can anybody manage to do this question?

    A uniform disc of mass m and radius a, rotating at an angular speed w is placed on a flat horizontal surface. If the coefficient of friction is u, calculate the frictional torque on the disc and hence the time it takes for it to come to rest.

    Cheers in advance,

    Chris
    Test over - the answer is
    Iw
    uamg
 
 
 

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