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Solution 4.5d

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(New page: Image:teori4.gif Using <math>{{F}^{2}}={{H}^{2}}+{{V}^{2}}</math> and <math>\tan \alpha =\frac{V}{H} </math> Here <math>V=-7\ \text{N}</math> and <math>H=-5\ \text{N}</math>...)
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Revision as of 12:33, 23 March 2010

Image:teori4.gif

Using F2=H2+V2

and

tan=VH

Here

V=7 N and H=5 N.

Substituting the given values


F2=52+ 72=74 


giving


F=86 N


Also

tan=57=1.4 giving

=125.5

Here the solution in the third quadrant has been chosen.