A flywheel is a solid rotating disk that is sometimes used, Ask an Expert

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A flywheel is a solid, rotating disk that is sometimes used to store energy. The moment of inertia for a solid disk is, whereMis the mass andR is the radius. For a flywheel that weighs 10 kg and has a radius of 0.2 m, determine the following.

A) If a point on the outside of the disk is moving at 15 m/s, what is the angular velocity of the flywheel?

B) If the flywheel starts from rest and accelerates at a constant rate for 300 s to bring it up to the angular velocity found in Part A, what is the angular acceleration?

C) If the angular acceleration in Part B is generated by a constant force applied tangentially to the outside edge of the disk (as shown below), what is the magnitude of the force?

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