7. Find the least value of P required to cause the system of blocks shown in figure below to have impending motion to the left. The coefficient of friction under each block is 0.20 and the pulleys are assumed to be frictionless. 30 kN 10 kN 30 (Ans.: P = 12.5 kN)

7. Find the least value of P required to cause the system of blocks shown in figure below to have impending motion to the left. The coefficient of friction under each block is 0.20 and the pulleys are assumed to be frictionless. 30 kN 10 kN 30 (Ans.: P = 12.5 kN)

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 7.72P

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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

7. Find the least value of P required to cause the system of blocks shown in figure below to
have impending motion to the left. The coefficient of friction under each block is 0.20 and
the pulleys are assumed to be frictionless.
30 kN
10 kN
30
(Ans.: P = 12.5 kN)

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