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COSMOS: Complete Online <strong>Sol</strong>utions Manual Organization System<br />
Chapter 2, <strong>Sol</strong>ution 75.<br />
(a) F ( )<br />
x<br />
= 900 N cos30° cos 25°<br />
= 706.40 N<br />
F y<br />
= ( 900 N)<br />
sin 30°<br />
F = 706 N !<br />
x<br />
= 450.00 N<br />
F = 450 N !<br />
y<br />
F z<br />
=− ( 900 N)<br />
cos30° sin 25°<br />
=− 329.04 N<br />
F =−329 N !<br />
z<br />
(b)<br />
cosθ =<br />
x<br />
706.40 N<br />
900 N<br />
or θ x = 38.3°<br />
!<br />
cosθ =<br />
y<br />
450.00 N<br />
900 N<br />
or θ y = 60.0°<br />
!<br />
cosθ<br />
z<br />
=<br />
−329.40 N<br />
900 N<br />
or θ z = 111.5°<br />
!<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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