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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Laws of Motion
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Three forces acting on a body as shown. To have resultant force only along y-direction, the magnitude of the minimum additional force needed is


$a)\; \sqrt {3}\; N \\ b)\; 0.5 \;N \\ c)1.5 \;N \\d) \large\frac{\sqrt 3}{4}\;N $
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F required ={-x component of the resultant force}
$\bar F$ required $=-[-i+\large\frac{1}{2}$$ i]$
$\qquad=\large\frac{1}{2} $$i$
$\qquad=0.5 \;N$
Hence b is the correct answer. 


answered Jul 15, 2013 by meena.p
edited Feb 10, 2014 by meena.p

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