A fan rotating with an angular speed of 3.2 rad/s is turned off, a frictional torque of 0.135 N-m slows it to a stop in 20s. What is the moment of intertia of the fan?

i cant see the choices man

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

answera compound;

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