An airplane propeller is 2.68 m in length (from tip to tip) and has a mass of 137 kg. When the airplane's engine is first started, it applies a constant torque of 1930 N . m to the propeller, which starts from rest.
1. What is the average power output of the engine during the first 5.00 rev?
2. What is the instantaneous power output of the motor at the instant that the propeller has turned through 5.00 rev?