At one instant, the center of mass of a system of two particles is located on the x-axis at x = 2.0 {rm{ m}} and has a velocity of (5.0 {rm{ m/s}} ) hat i. One of the particles is at the origin. The other particle has a mass of 0.10 {rm kg} and is at rest on the x-axis at x = 8.0 {rm{ m}}.