A(n) 4.67 kg sphere makes a perfectly in- elastic collision with a second sphere that is initially at rest. The composite system moves with a speed…

A(n) 4.67 kg sphere makes a perfectly in-elastic collision with a second sphere that isinitially at rest. The composite system moveswith a speed equal to one-third the originalspeed of the 4.67 kg sphere.What is the mass of the second sphere?