Question

As shown in figure the tension in the horizontal cord is 30 N. The weight W and tension in the string OA in Newton are

• A. 30$\sqrt{3},$ 30
• B. 30$\sqrt{3},$ 60
• C. 60$\sqrt{3},$ 30
• D. None of these

Answer 1

Answer: (B)

30$\sqrt{3},$ 60

Answer 2

From the figure $T\sin 30^{o} = 30$ …(i)

$T\cos 30^{o} = W$ …(ii)

By solving equation (i) and (ii) we get

$W = 30\sqrt{3}N$ and $T = 60N$