Three identical point masses, each of mass 1kg 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

Options :

1. 1.67 x 10⁻⁹( î + ĵ )N

2. 3.34 x 10⁻¹⁰( î + ĵ )N

3. 1.67 x 10⁻⁹( î - ĵ )N

4. 3.34 x 10⁻¹⁰( î + ĵ )N