SOLUTIONS MANUAL FOR ENGINEERING MECHANICS STATICS 14TH EDITION HIBBELER

SOLUTIONS MANUAL FOR ENGINEERING MECHANICS STATICS 14TH
EDITION HIBBELER




SOLUTIONS

,SOLUTIONS MANUAL FOR ENGINEERING MECHANICS STATICS 14TH EDITION HIBBELE

,
, 2–1.
If 60° and 450 N, determine the magnitude of the

y
resultant force and its direction, measured counterclockwise
from the positive x axis. F



x
15
700 N

SOLUTION
The parallelogram law of addition and the triangular rule are shown in Figs. a and b,
respectively.

Applying the law of consines to Fig. b,

7002 4502 2(700)(450) cos 45°


497.01 N 497 N Ans.

This yields

sin sin 45°
95.19°
700 497.01


Thus, the direction of angle of F measured counterclockwise from the
positive axis, is


60° 95.19° 60° 155° Ans.




22