Question

A body of mass 100 gm is rotating in a circular path of radius r with constant speed. the work done in one complete revolution is
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Answer 1

ANSWER:

                 WORKDONE=FORCE X DISPLACEMENT  

                       NOW,

                      DISPLACEMENT AROUND A CIRCULAR PATH IS

                      ALWAYS 0.

                       SO,

                       WORKDONE=F X S

                               W=F X 0. SO,

                               WORKDONE=0