Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the
Question:
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 2.0 m diameter and a mass of 230 kg. Its maximum angular velocity is 1,600 rpm.
a) A motor spins up the flywheel with a constant torque of 51 N m. How long does it take the flywheel to reach top speed: Correct answer is t=380 s
b) How much energy is stored in the flywheel? Correct answer is E=1.6x10^6J
c) The flywheel is disconnected from the motor and connected to a machine to which it will deliver energy. Half the energy stored in the flywheel is delivered in 2.5 s. What is the average power delivered to the machine? Correct answer is P=3.2x10^5W
Need help with this d) How much torque does the flywheel exert on the machine? Express your answer with the appropriate units.
Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight