4. The three bars have a weight of W₁ = 20 lb. WB 40 lb, and W = 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 CERCERS CHCB=0.5 BR-03 AHAD=0.2 D

4. The three bars have a weight of W₁ = 20 lb. WB 40 lb, and W = 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 CERCERS CHCB=0.5 BR-03 AHAD=0.2 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 7.20P: The 3600-lb car with rear wheel drive is attempting to push the 4500-lb crate. The center of gravity...

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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

4. The three bars have a weight of WA =
20 lb, WB = 40 lb, and We = 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
CCB=0.5
BR 0.3
AHAD 0.2
D
P

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