Q.
The pulleys and the strings shown in figure are smooth and of negligible mass. For the system to remain in equilibrium, the angle $\theta$ should be
A) $0{^\circ}$
B) 30${^\circ}$
C) 45${^\circ}$
D) 60${^\circ}$
Explanation
(c) $2mg\cos{\theta = \sqrt{2}\ mg}$
[image:5_image239.emf]
or $\cos\theta = \frac{1}{\sqrt{2}}$ or $\theta = 45{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.