Question

A couple of moment 200/π dyne cm produces 2 revolutions per second in a body. Calculate the work done during two revolutions.
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Answer 1

Answer:

Explanation:

The work done W = F.s

momemt of force =  torque =200/π dyne cm

no.of revolutions n = 2

For rotational  motion  ,

W = F.r.θ    = τ.θ   =τ.2πn  

                             =200π× 2× 2× π W = 800 dyne cm radian

Hope it helps.........