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10.3 Physics Help Please! Inertia?

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An energy storage system based on a flywheel (a rotating disk) can store a maximum of 4.3 MJ when the flywheel is rotating at 1.8×104 revolutions per minute.

What is the moment of inertia of the flywheel?

Express answer in kg * m^2

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  1. I = 2*E/ω² = 2*4.3E6/(1.8E4*2π/60)² = 2.42 kg∙m²

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