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The flywheel of an old steam engine is a solid homogeneous metal disk of mass M...

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Physics

The flywheel of an old steam engine is a solid homogeneous metaldisk of mass M = 112 kg and radius R = 80 cm. The engine rotatesthe wheel at 520 rpm. In an emergency, to bring the engine to astop, the flywheel is disengaged from the engine and a brake pad isapplied at the edge to provide a radially inward force F = 125 N.If the coefficient of kinetic friction between the pad and theflywheel is μk = 0.2.

How many revolutions does the flywheel make before coming torest?

How long does it take for the flywheel to come to rest?

Calculate the work done by the torque during this time.

Answer & Explanation Solved by verified expert
3.9 Ratings (443 Votes)
a The force F 125 N applied to the flywheel produces the friction force that will eventually stop the flywheel The friction force Ff 02125N 25 N The torque on the wheel is T Ffr    See Answer
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