2. Block A is attached to a weight B via a cable over a frictionless pulley. The weight of block A is 300 lb. and the weight of B is 150 lb. The force P = 40 lb., is applied to block A. The coefficients of friction are: µs = 0.35 and l = 0.25. Determine: a) the magnitude and direction of the friction force, F, acting on block A, b) does block A move? If yes, in which direction? Ans: a) F = 52.5 lbN ÷, b) block moves → A P 4 В

2. Block A is attached to a weight B via a cable over a frictionless pulley. The weight of block A is 300 lb. and the weight of B is 150 lb. The force P = 40 lb., is applied to block A. The coefficients of friction are: µs = 0.35 and l = 0.25. Determine: a) the magnitude and direction of the friction force, F, acting on block A, b) does block A move? If yes, in which direction? Ans: a) F = 52.5 lbN ÷, b) block moves → A P 4 В

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.63P: The leather rein used to fasten the horse to the hitching rail weighs 3.5 oz per foot. The...

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