Question

A stone of mass m at the end of a string of length $l$ is whirled in a vertical circle at a constant speed. The tension in the string will be maximum when the stone is

• A. At the top of the circle
• B. Half-way down from the top
• C. Quarter -was down from the top
• D. At the bottom of the circle

Answer 1

The correct option is D At the bottom of the circle

$\text{At the bottom of the circle tension in the string}\Rightarrow T$

$T=\text{centrifugal force + weight of the stone}$