Statement of a problem № 42205


A solid, uniform cylinder with mass 8.25 kg and diameter IS.0 cm is spinning at 220 rpm on a thin, frictionless axle that passes along the cylinder axis. You design a simple friction brake to stop the cylinder hay pressing the brake against the outer rim with a normal force. The coefficient of kinetic friction between the brake and rim is 0.333. What must the applied normal force be to bring the cylinder to rest after it has timed through S.25 revolutions?

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