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.

Answer

A

Explanation

At the lowest point, mg acts downward as `T_(1)` upwards so that net force=`mg+T_(2)`. Hence option (a) is correct.