To maintain a rotor at a uniform angular speed of 200 rad s-1, an engine needs to transmit a torque of 180 N m. 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.

To maintain a rotor at a uniform angular speed of 200 rad s-1, an engi

1.	To maintain a rotor at a uniform angular speed of 200 rad s-1, an engine needs to transmit a torque of 180 N m. 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.
Answer» <P> Solution :Here `a=200" RADS"^(-1)`, TORQUE `tau=180Nm` Power P = torque `(tau)xx` angular speed `(OMEGA)` `=180xx200=36000` Watt = 36 kW