Calculate the moment of inertia of a fly wheel, if its angular velocity is increased from 60 r.p.m. to 180 r.p.m. when 100 J of work is done on it.

Calculate the moment of inertia of a fly wheel, if its angular velocit

1.	Calculate the moment of inertia of a fly wheel, if its angular velocity is increased from 60 r.p.m. to 180 r.p.m. when 100 J of work is done on it.
Answer» Solution :KINETIC ENERGY `E = (1)/(2)I(omega_(2)^(2)-omega_(1)^(2))` `100=(1)/(2)I(4pi^(2).9-4pi^(2).1^(2)) "" I=0.633 kg m^(2)`