The design of the cam-lock vise provides a quick positive


1. The circular cylinder weighs 50 lb and is held by a cord fixed to its periphery at B and to the ground at A. If the coefficient of static friction is 0.60, calculate the force P required to cause the cylinder to slip.

430_Find the friction force F in the locking position.png

2. The design of the cam-lock vise provides a quick positive clamping action with a friction coefficient between the cam and the movable jaw A of 0.30.

(a) As the cam and lever are rotating clockwise approaching the locking position shown with P = 30 lb, determine the clamping force C.

(b) With P removed, find the friction force F in the locking position.

(c) Determine the force P', opposite from P, required to release the clamp.

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Mechanical Engineering: The design of the cam-lock vise provides a quick positive
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