Q.
In the arrangement shown in figure, if a force $2\ mg$ is applied at the free end of the rope, the mass $m$ will ascend with an acceleration of
A) $\frac{g}{3}$
B) $\frac{g}{2}$
C) $g$
D) $2\ g$
Explanation
(d) Force $2mg\ $applied at the free end of the string acts on mass $m$. Therefore, its acceleration
$a = \frac{Force}{mass}$
$= \frac{2mg}{m} = 2g$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.