A Propeller Is Spun Up from Rest to 1500 Rpm

Multiple Choice

A propeller is spun up from rest to 1500 rpm in 15.0 s under the influence of a constant torque. If the work done by the engine in giving the propeller its final angular velocity is 25 kJ, what is the torque supplied by the engine?

A) 21 N·m
B) 11 N·m
C) 42 N·m
D) 3.4 N·m
E) 130 N·m