Flywheel

Flywheel#

A flywheel is a wheel with a high moment of inertia that spins to store kinetic energy. It has applications in cars, gyroscopes, and electrical power systems.

A wheel.

A flywheel of mass \({{params.m}}\ \rm{kg}\), and radius of gyration \({{params.R}}\ \rm{cm}\) is spinning at \({{params.RPM}}\ \rm{RPM}\).

Part 1#

How much kinetic energy is stored in the wheel?

Answer Section#

Please enter in a numeric value in kJ.

Part 2#

If the coefficient of rolling friction of the bearing is \({{params.Crr}}\), for how long will the flywheel spin? This friction occurs at an inner radius of \({{params.r}}\ \rm{cm}\). Note that the rolling resistance force is analogous to the force of friction, where \(F\_{friction} = {\mu}\_rF_N\).

Answer Section#

Please enter in a numeric value in hours.

Attribution#

Problem is licensed under the CC-BY-NC-SA 4.0 license.
The Creative Commons 4.0 license requiring attribution-BY, non-commercial-NC, and share-alike-SA license.