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Solution 4.5d

From Mechanics

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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>...)
Current revision (16:10, 4 February 2011) (edit) (undo)
 
Line 21: Line 21:
-
<math>F=8.6\ \text{N}</math>
+
<math>F=8\textrm{.}6\ \text{N}</math>

Current revision

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=8.6 N


Also

tan=−5−7=1.4 giving

=−125.5

Here the solution in the third quadrant has been chosen.

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