Q. A small cone filled with water is revolved in a vertical circle of radius 4 m and the water does not fall down. What must be the maximum period of revolution?
A) 4 s
B) 2 s
C) 1 s
D) 6 s
Explanation
(a) Water will not fall down, if weight, $mg =$ centrifugal force
$= mr\omega^{2} = mr\left( \frac{2\pi}{T} \right)^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.