Chapter 13, Problem 6P

GO In Fig. 13-32, a square of edge length 20.0 cm is formed by four spheres of masses m₁ = 5.00 g, m₂ = 3.00 g. m₃ = 1.00 g, and m₄ = 5.00 g. In unit-vector notation, what is the net gravitational force from them on a central sphere with mass m₅ = 2.50 g?

Figure 13-32 Problem 6