200 N - block placed under the head, of the claw hammer as shown greatly facilitates the extraction of the nail. If the 200-N pull on the handle is required, to pull the nail calculate the tension T in the nail and the magnitude A of the force exerted by the hammer head on the block. The contacting surfaces at A are sufficiently rough to 200 mm 45 mm prevent slipping - 50- I mm

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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.