Chapter 9, Problem 72P

(II) Mass M_A = 35 kg and mass M_B = 25 kg. They have velocities (in m/s) ${\stackrel{\to }{v}}_{\text{A}}=12\hat{i}-16\hat{j}$ and ${\stackrel{\to }{v}}_{\text{B}}=-20\hat{i}\text{+}\text{14}\hat{j}$. Determine the velocity of the center of mass of the system.