Question

A system consist of particles of masses 5, 2 and 3g located at (1, 0, -1) ( 1, 2, 1) and ( 1, -1, -3) respectively. find the center of position mass involved

Answer 1

for each coordinate (x,y,z) find the weighted average of all the masses times their distances. For example,
Mx = (5*1 + 2*1 + 3*1)/3 = 10/3
do My and Mz similarly