Question

Find the center of mass of four 2kg bodies placed at eachcorner of a square

of side 1.5 m.

Answer 1

Let the left bottom body be at the origin.

$$4mX=m(0+0+1.5+1.5)\\X=0.75\ m \\4mY=m(0+0+1.5+1.5)\\Y=0.75\ m\\$$

COM is at center of square.