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Physics - Rotational motion

Physics - Rotational motion

by Krishnan G -
Number of replies: 1

Whether the following statement is true or false?

A solid sphere and a hollow sphere of same mass M and same radius R are released from the top of a rough inclined plane. Friction co-efficient is same for both the bodies. If both bodies perform imperfect rolling, then the work done by friction for the motion of bodies from top of incline to the bottom will be same for both the bodies.

Answer is given as FALSE.  Please explain.

In reply to Krishnan G

Re: Physics - Rotational motion

by Srinath Murthy -

Heat generated is the work done against kinetic friction in this case. Just saying imperfect rolling does not clarify how much sliding is taking place. Little sliding or more sliding both are imperfect rolling but work done by friction is different. Info. insufficient to say same in both cases.