Question

Four 6.5-kg spheres are located at the corners of a square of side 0.70 m .

Calculate the magnitude of the gravitational force exerted on one sphere by the other three.

Calculate the direction of the gravitational force exerted on one sphere by the other three.

Answer 1

the net force will be toward the center of the square, along the diagonal

it's symmetric, so you only have to do one corner

use the gravitational formula
... the diagonal is direct
... the adjacent corners pull at a 45º angle along the diagonal (vector)