Sol Cap 02 - Edicion 8

COSMOS: Complete Online Solutions Manual Organization System
Chapter 2, Solution 9.
Using the Law of Sines
F1 R 20 lb
= =
sinα
sin 38°
sin β
α = 90° − 10° = 80 ° , β = 180° − 80° − 38° = 62°
Then:
F1 R 20 lb
= =
sin80° sin 38° sin 62°
or (a) F 1 = 22.3 lb !
(b)
R = 13.95 lb !
Vector Mechanics for Engineers: Statics and Dynamics, 8/e, Ferdinand P. Beer, E. Russell Johnston, Jr.,
Elliot R. Eisenberg, William E. Clausen, David Mazurek, Phillip J. Cornwell
© 2007 The McGraw-Hill Companies.