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Solution 4.5d

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Revision as of 12:33, 23 March 2010 by Ian (Talk | contribs)
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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.