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Find the least value of P required to cause the system of blocks shown to have impending motion to the left. The coefficient of friction under each block is 0.20. 50kN 15kN

Find the least value of P required to cause the system of blocks shown to have impending motion to the left. The coefficient of friction under each block is 0.20. 50kN 15kN

Classical Dynamics of Particles and Systems
Classical Dynamics of Particles and Systems
5th Edition
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Stephen T. Thornton, Jerry B. Marion
Chapter9: Dynamics Of A System Of Particles
Section: Chapter Questions
Problem 9.18P
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Find the least value of P required to cause the system of blocks shown to have impending motion to the left. The coefficient of friction under each block is 0.20. 50kN 15kN 30%
Transcribed Image Text:Find the least value of P required to cause the system of blocks shown to have impending motion to the left. The coefficient of friction under each block is 0.20. 50kN 15kN 30%
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In step 2, for m to be max dm/da = 0 . Why did you use max when solving for the least value of P?

 

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