3.4-7 Force P is applied to Block 2 parallel to an inclined smooth surface to hold the two blocks in equilibrium (see figure). The blocks are connected by a cable that runs over a frictionless pulley at A. (a) Find the required range of values of force P to maintain equilibrium. (b) Revise your solution if friction between Block 2 and the inclined surface (µ. = 0.2) is now

International Edition---engineering Mechanics: Statics, 4th Edition
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ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
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Chapter7: Dry Friction
Section: Chapter Questions
Problem 7.72P
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I was not sure how to write the equllibrium equations for this problem and find P. 

 

 

3.4-7 Force P is applied to Block 2 parallel to an
inclined smooth surface to hold the two blocks in
equilibrium (see figure). The blocks are connected
by a cable that runs over a frictionless pulley at A.
(a) Find the required range of values of force P to
maintain equilibrium.
(b) Revise your solution if friction between Block 2
and the inclined surface (u. = 0.2) is now
considered.
Let W, = 10 kips, W, = 40 kips, 02 = 60°, and 0, = 30°.
W2
A
Pulley
02
W1
Transcribed Image Text:3.4-7 Force P is applied to Block 2 parallel to an inclined smooth surface to hold the two blocks in equilibrium (see figure). The blocks are connected by a cable that runs over a frictionless pulley at A. (a) Find the required range of values of force P to maintain equilibrium. (b) Revise your solution if friction between Block 2 and the inclined surface (u. = 0.2) is now considered. Let W, = 10 kips, W, = 40 kips, 02 = 60°, and 0, = 30°. W2 A Pulley 02 W1
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