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COSMOS: Complete Online <strong>Sol</strong>utions Manual Organization System<br />
Chapter 2, <strong>Sol</strong>ution 80.<br />
(a)<br />
F = 180 N<br />
x<br />
With<br />
Fx<br />
= Fcos60° cos35°<br />
180 N = F cos60° cos35°<br />
or F = 439.38 N<br />
F = 439 N !<br />
(b)<br />
cosθ =<br />
x<br />
180 N<br />
439.48 N<br />
θ = 65.8°!<br />
x<br />
( )<br />
F = 439.48 N sin 60°<br />
y<br />
F y =<br />
380.60 N<br />
380.60 N<br />
cosθ y =<br />
439.48 N<br />
θ = 30.0°!<br />
y<br />
( )<br />
F =− 439.48 N cos60° sin 35°<br />
z<br />
F =− 126.038 N<br />
z<br />
cos<br />
θ z<br />
=<br />
−126.038 N<br />
439.48 N<br />
θ = 106.7°!<br />
z<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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