A solid, uniform cylinder having mass 8.25 kg and diameter 18.0 cm is spinning with the angular velocity 205 rpm on a thin, frictionless axle which passes all along the cylinder axis. You design a simple friction-brake to stop the cylinder by pressing the brake against the outer rim with the normal force. The coefficient of kinetic friction between the brake and rim is 0.344.
What should the applied normal force be to bring the cylinder to rest after it has turned via 5.50 revolutions.