JEE Main 20199 Apr, Evening shiftPhysicsEasyRotational Motion140× since 2002
Moment of inertia of a body about a given axis
is 1.5 kg m². Initially the body is at rest. In order
to produce a rotational kinetic energy of
1200 J, the angular accleration of 20 rad/s²
must be applied about the axis for a
duration of :-