(20 pts] 1. Sphere A has mass m. = 0.05 kg, velocity magnitude v = 2.0 m/s making an angle 0 = 30 with the + r axis. Sphere B has mass m, =0.03 kg, velocity magnitude v. = 310 m/s and moves along the ty axis. Sphere C has mass me = 0.04 kg, velocity magnitude v = 4.0 m/s and moves along the +r axis. See figure. They are all approaching the origin as they slide on a frictionless surface. The three spheres arrive at the origin at the same time and stick together. (a) What is the final velocity of the combined object? (b) How does the final kinetic energy compare to the kinetic energy before the collision? m a X C