Q. A body of mass $m$ tied to a string is moved in a vertical circle of radius $r$. The difference in tensions at the lowest point and the highest point is
A) 2 $mg$
B) 6 $mg$
C) 4 $mg$
D) 8 $mg$
Explanation
(b) $T_{L} - T_{H} = 6\ mg$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.