# HW18 - equilibrium in the position shown when the magnitude...

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HW18 Terry Cooke: Cal Poly San Luis Obispo

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Chapter 8, Problem 25 A window sash weighing 10 lb is normally supported by two 5-lb sash weights. Knowing that the window remains open after one sash cord has broken, determine the smallest possible value of the coefficient of static friction. (Assume that the sash is slightly smaller than the frame and will bind only at Points A and D .)
Chapter 8, Problem 30 The 50-lb plate ABCD is attached at A and D to collars that can slide on the vertical rod. Knowing that the coefficient of static friction is 0.40 between both collars and the rod, determine whether the plate is in

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Unformatted text preview: equilibrium in the position shown when the magnitude of the vertical force applied at E is ( a ) 0, P ( b ) 20 lb. P Chapter 8, Problem 32 A pipe of diameter 60 mm is gripped by the stillson wrench shown. Portions AB and DE of the wrench are rigidly attached to each other, and portion CF is connected by a pin at D . If the wrench is to grip the pipe and be self-locking, determine the required minimum coefficients of friction at A and C ....
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## This note was uploaded on 10/01/2010 for the course ME 211 taught by Professor Staff during the Fall '05 term at Cal Poly.

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HW18 - equilibrium in the position shown when the magnitude...

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