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  4. In the figure shown, the tension in the horizontal cord is 30 N . Find the weight of the body B .

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Q. In the figure shown, the tension in the horizontal cord is $ 30\, N $ . Find the weight of the body $ B $ .Physics Question Image

AMUAMU 2011Laws of Motion

Solution:

image
From Lami’s theorem
$\frac{B}{\sin\,135^{\circ}} = \frac{30}{\sin\,135^{\circ}}$
$ B = 30\,N$