Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a...

Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.7 m diameter and a mass of 275 kg. A motor spins up the flywheel with a constant torque of 45 N m. How long does it take the flywheel to reach top angular speed of 1150 rpm?