Three mass points each of mass m are placed at the vertices of an equilateral triangle of side l. What is the gravitational field and potential at the centroid of the triangle due to the three masses?

Explanation

The distance x of the null point `4mu C` charge and between the two charge is
`(4)/(x^(2)) = (9)/((30-x)^(2)) (or) x = (30)/(sqrt((9)/(4))+1)= (30 xx 2)/(5) = 12cm`