As shown in figure the tension in the horizontal cord is 30…

Physics Vectors Lami's Theorem Single Correct MCQ

Published on: September 12, 2026

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

30 \(\sqrt{3},\) 30

30 \(\sqrt{3},\) 60

60 \(\sqrt{3},\) 30

None of these

Text Solution

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The correct answer is:

From the figure \(T \sin 30^\circ = 30\) …(i)

\(T \cos 30^\circ = W\) … (ii)

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

\(W = 30 \sqrt{3N}\) and \(T = 60\,\mathrm{N}\)

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