F is the gravitational force between two point masses `m_(1)` and `m_(2)` , separated by a distance d. A point mass `2m_(1)` is then brought near `m_(1)`. What is the total force on `m_(2)` ?

Options

A. 2F
B. 3F
C. F
D. `(F)/(2)`

Answer

B

Explanation

`F=(GM_(1)m_(2))/(d^(2))`
if the point mass `2m_(1)` is brought near `m_(1)` then the force on `m_(2)` due to `m_(1)` will be `F'=(G.m_(2)(Mm_(1)+2m_(1)))/(d^(2))=3F`