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COSMOS: Complete Online <strong>Sol</strong>utions Manual Organization System<br />
Chapter 2, <strong>Sol</strong>ution 70.<br />
Free-Body Diagram: Pulley C<br />
(a) F T ( ) ( )<br />
Σ = 0: cos30° − cos50° − 800 N cos50° = 0<br />
x<br />
ACB<br />
Hence<br />
T ACB =<br />
2303.5 N<br />
(b) ( ) ( )<br />
Σ F = 0: T sin 30°+ sin 50° + 800 N sin 50°− Q = 0<br />
y<br />
ACB<br />
TACB<br />
= 2.30 kN ⊳<br />
( )( ) ( )<br />
2303.5 N sin 30°+ sin 50° + 800 N sin 50°− Q = 0<br />
or<br />
Q = 3529.2 N<br />
Q = 3.53 kN ⊳<br />
Vector Mechanics for Engineers: Statics and Dynamics, 8/e, Ferdinand P. Beer, E. Russell Johnston, Jr.,<br />
Elliot R. Eisenberg, William E. Clausen, David Mazurek, Phillip J. Cornwell<br />
© 2007 The McGraw-Hill Companies.
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