Question: High-speed flywheels are made from composite materials. A flywheel is a ring with a 3-m radius, a mass of 50 kg and 20,000 rpm. How

High-speed flywheels are made from composite materials. A flywheel is a ring with a 3-m radius, a mass of 50 kg and 20,000 rpm. How much energy is stored in the flywheel?

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