Some european trucks run on energy stored in a rotating, Physics

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Some european trucks run on energy stored in a rotating

Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 200p rad/s. One such flywheel is a solid, uniform cylinder with a mass of 600 kg and a radius of 1.2 m.

(a) What is the kinetic energy of the flywheel after charging?

__________J

(b) If the truck operates with an average power requirement of 8.0 kW, for how many minutes can it operate between chargings?

__________min

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Physics: Some european trucks run on energy stored in a rotating

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