6- The three bars have a weight of WA= 20 Ib, WB = 40 Ib, and Wc = 60 lb, respectively. If the coefficients of static friction at the surfaces of contact are as shown. Determine the smallest horizontal force P needed to move block A. C =0.5 17 IS BBA =0.3 A HAD=0.2 p P D

6- The three bars have a weight of WA= 20 Ib, WB = 40 Ib, and Wc = 60 lb, respectively. If the coefficients of static friction at the surfaces of contact are as shown. Determine the smallest horizontal force P needed to move block A. C =0.5 17 IS BBA =0.3 A HAD=0.2 p P D

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 7.3P: Two identical chairs, each weighing 14 lb, are stacked as shown. The center of gravity of each chair...

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6- The three bars have a weight of WA= 20 Ib, WB = 40 Ib, and Wc = 60 lb, respectively. If the
coefficients of static friction at the surfaces of contact are as shown. Determine the smallest
horizontal force P needed to move block A.
Ce=0.5 p
17
IS
BBA =0.3
A HAD=0.2 p P
D

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