Three particle of mas m each are placed at the three corners of an equlateral triangle of side a. Find the work which should be done on this system to increase the sides of the triangle to 2a.

Answer

A, B, C

Explanation

Initially the side the triangle =a
To increase it 2a
work done `=(GM^2)/(2a)+(GM^2)/a`
`=(3GM^2)/(2a)`