8–140 Friction (Chapter 8: Hibbeler Statics) Benam Academy

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ENGINEERING MECHANICS - STATICS, 13TH EDITION, R. C. HIBBELER
CHAPTER 8: Friction
PROBLEM: 8–140
*8–140. The uniform 20-lb ladder rests on the rough floor for which the coefficient of static friction is ms = 0.4 and against the smooth wall at B . Determine the horizontal force P the man must exert on the ladder in order to cause it to move.
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