Задача id12630

A flywheel, consisting of a heavy rim with mass M and radius R and a light hub connected to the rim using thin spokes, rotates around a horizontal axis with an angular velocity w. The brake pad is pressed against the flywheel rim with a force F. The coefficient of friction between the pad and the rim is k. What is the braking time t and how many revolutions n will the flywheel make before it comes to a complete stop? The mass of the hub and spokes can be neglected.

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