A body of mass `m` is rotated in a vertical circle with help of light string such that velocity of body at a point is equal to critical velocity at that point. If `T_(1), T_(2)` be the tensions in the string when the body is crossing the highest and the lowest positions then the following relation is correct

Options

A. `T_(2) - T_(1) = 6mg`
B. `T_(2) - T_(1) = 4mg`
C. `T_(2) - T_(1) = 3mg`
D. `T_(2) - T_(1) = 2mg`

Answer

`(1)`

Explanation

`T_(2) = 6mg, T_(1) = 0
T_(2) - T_(1) = 6mg`