1. A wheel is rotating with an angular speed of 
. It is stopped to rest by applying a constant torque in 
. If the moment of inertia of the wheel about its axis is 0.20 kg-m 2 , then the work done by the torque in two seconds will be
Text Solution
Verified by ExpertsThe correct answer is:
C
rad / sec , 
So angular retardation 
Now angular speed after 2 sec 
= 
rad / sec
Work done by torque in 2 sec = loss in kinetic energy = 
= 30 J .
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