Question

To maintain a rotor at a uniform angular speed of `200 s^(-1)`, an engine needs to transmit a torque of `180 N-m`. What is the power of the engine required ?

Answer 1

Here, `omega = 200 rad s^(-1)` , torque, `tau = 180 N-m` , Power, `P = ?`
As `P = tau omega :. P = 180 xx 200 = 36000 "watt" = 36 kW`