A propeller is spun up from rest to 1500 rpm under the influence of a constant torque in 15.0s.If the work done by the engine in giving the propeller its final angular velocity is 25kJ,what is the torque supplied by the engine?
A) 21Nm
B) 11 Nm
C) 42 Nm
D) 21 Nm
E) 130 Nm

Question

Quizplus · Accepted Answer

Work done = Torque * Angular displacement25 kJ = Torque * (1500 rpm * 2π/60 rad/s * 15 s)Torque = 21 Nm

A Propeller Is Spun Up from Rest to 1500 Rpm