A stone of mass m tied to the end of a string revolves in a vertical circle of radius R. The net forces at the lowest and highest points of the circle directed vertically downwards are: [Choose the correct alternative] Lowest point Highest point
`T_(1)` and `V_(1)` denote the tension and speed at the lowest point `T_(2)` and `V_(2)` denote the corresponding values at the highest points.

Options

A. `mg-T_(1)mg+T_(2)`
B. `mg+T_(1)mg-T_(2)`
C. `mg+T_(1)-(mv_(1)^(2))//R mg-T+(mv_(1)^(2))//R`
D. `mg-T_(1)-(mv_(1)^(2))//Rmg+t_(2)+(mv_(1)^(2))//R`

Answer

A