A 150lb man stands on a 60lb bar to which a cable is fixed at B. The cable passes over two fixed pegs with coefficients of friction indicated.  Assume that the arrangement of the pegs permits the cable to contact each peg over a total angle of 90-degrees (90-degrees per peg).  Assume that the normal force exerted by the man on the bar acts downward through A.  Find the largest force the man can exert on the cable and maintain the bar horizontal.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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 A 150lb man stands on a 60lb bar to which a cable is fixed at B. The cable passes over two fixed pegs with coefficients of friction indicated.  Assume that the arrangement of the pegs permits the cable to contact each peg over a total angle of 90-degrees (90-degrees per peg).  Assume that the normal force exerted by the man on the bar acts downward through A.  Find the largest force the man can exert on the cable and maintain the bar horizontal.  

μ = 0.1
-4 ft-
2 ft
μl
=
0.2
-10 ft
Transcribed Image Text:μ = 0.1 -4 ft- 2 ft μl = 0.2 -10 ft
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