The 172-lb exerciser is beginning to execute a bicep curl. When in the position shown with his right elbow fixed, he causes the 21-lb cylinder to accelerate upward at the rate 0.28g. Neglect the effects of the mass of his lower arm and estimate the normal reaction forces at A and B. Friction is sufficient to prevent slipping. A Go B 10" 10" 13" - 15° 60" 21 lb

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Clutches, Brakes, Couplings, and Flywheels

The clutch is described as a machine element used to connect or disconnect two shafts together to transmit torque or power. The clutch works on the principles of friction. The clutch is commonly used in automobiles to transfer power from the driving shaft to the driven shaft.