Q 11-04-021NEETJEE MainEAMCET 2011 (Engineering)Easy
A $1$ N pendulum bob is held at an angle $\theta$ from the vertical by a $2$ N horizontal force $F$. The tension in the string supporting the pendulum bob (in newton) is
Answer: (C) $\sqrt{5}$
Concept. The tension balances the perpendicular weight and horizontal force.
Step 1. Magnitude. $T = \sqrt{1^2 + 2^2} = \sqrt5$ N.
Answer. $\sqrt5$ (Option C).
Solution by Sreeraj P, M.Sc Physics