Three identical point masses, each of mass 1 kg lie in the x-y plane at points (0, 0), (0, 0.2m) and (0.2m, 0). The net gravitational force on the mass at the origin is

Let particle A lies at origin, particles B and C on y and X-axis respectivelyF→AC=GmAmBrAB2i^=6.67×10−11×1×1(0.2)2i^=1.67×10−9i^NSimilarly F→AB=1.67×10−9j^N∴ Net force on Particle AF→=F→AC+F→AB=1.67×10−9(i^+j^)N