To maintain a rotor at a uniform angular speed or 200 rad `s^(-1)` an engine needs to transmit a torque of 180 Nm. What is the power required by the engine ? (Note : uniform angular velocity in the absence of friction implies zero torque. In practice, applied torque is needed to counter frictional torque). Assume that the engine is 100% efficient.

Options

A. `36 kW`
B. `18 kW`
C. `48 kW`
D. `72 kW`