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  4. The given figure is the part of a horizontally stretched net. Section AB is stretched with a force of 10 N. The tensions in the sections BC and BF are

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Q. The given figure is the part of a horizontally stretched net. Section $AB$ is stretched with a force of $10 N$. The tensions in the sections $BC$ and $BF$ arePhysics Question Image

KCETKCET 2005Laws of Motion

Solution:

From the figure.
image
$ T_{1}\, \cos \,30^{\circ} =T_{2} \,\cos\, 30^{\circ} $
$\therefore \,T_{1} =T_{2}=T$ (Let)
Again $T_{1} \,\sin \,30^{\circ}+T_{2} \,\sin\, 30^{\circ}=10$
$2 T \,\sin\, 30^{\circ}=10$
$2 T . \frac{1}{2} =10 $
$\Rightarrow \, T=10 \,N$
$\therefore $ Tension in section $BC$ and $BF$ are $10\, N$ and $10 \,N$