Qstnid -15- To Maintain A Rotor At A Uniform Angular Speed Of 200 Rad S<sup>-1</sup>, 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 Fricitional Torque). Assume That The Engine Is 100 Efficient. - 07: System Of Particles And Rotational Motion - Neet-xi-physics

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NEET-XI-Physics

07: System of particles and Rotational Motion

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#15
To maintain a rotor at a uniform angular speed of 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 fricitional torque). Assume that the engine is 100 efficient.

Ans : Here, a = 200 rad s^-1; Torque, τ= 180 N-m

Since,Power, P = Torque (τ) x angular speed (w)

= 180 x 200 = 36000 watt = 36 KW.