Question

# 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.

Solution

## Given: The angular speed of the rotor is $$200\ rad/s$$.The torque needed to be transmitted by the engine is $$180\ Nm$$.The power of the rotor required to transmit energy to apply a torque $$\tau$$ to rotate a motor with angular speed $$\omega,$$ $$P=\tau\omega$$$$=180\times 200W$$$$=36kW$$PhysicsNCERTStandard XI

Suggest Corrections

0

Similar questions
View More

Same exercise questions
View More

People also searched for
View More