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Question

Which of the following is TRUE for a flywheel which is retarding, if T is the torque on the crankshaft at any instant and Tmesn  is the mean resisting torque? 

A.

 Tmesn - T > 0 

B.

T - Tmesn > 0

C.

 Tmesn -T< 0 

D.

T -  Tmesn < 0

Answer ( Option A)

 Tmesn - T > 0 

Solution

(i) When a flywheel is retarding, it means, it is releasing energy.

(ii) In this condition, mean resisting torque is more than torque on the crank at any instant.

Hence, the correct option is (A) and (D)

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