The Rotor of a Motor Is Accelerated from Rest by a Torque

Multiple Choice

The rotor of a motor is accelerated from rest by a torque of 250 N m. When it has rotated through 10 revolutions, the gain in angular kinetic energy is:

A) 2.5kJ
B) 5.0kJ
C) 7.85kJ
D) 15.7kJ