A body rotates around a fixed axis. A torque acts on the body to change its rota

Question

A body rotates around a fixed axis. A torque acts on the body to change its rotational kinetic energy.

In which of the following cases does the body rotate through the greatest angle in the process of changing its kinetic energy?

a constant torque of 10 Nm acts as the kinetic energy changes from 500 J to 1500 J
a constant torque of 10 Nm acts as the kinetic energy changes from 500 J to 1000 J
a constant torque of 20 Nm acts as the kinetic energy changes from 500 J to 1000 J
a constant torque of 20 Nm acts as the kinetic energy changes from 500 J to 1500 J

Explanation / Answer

According to work energy theorem change in kinetic energy = torque * angular displacement angular displacement =change in kinetic energy / torque plg all the cases in the above equation we get is Answer (a)

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