19. A 5.0-g particle moving 60 m/s collides with a 2.0-g particle initially at rest. After thecollision each of the particles has a velocity that is directed 30 from the original directionof motion of the 5.0-g particle. What is the speed of the 2.0-g particle after the collision? A. 72 m/s B. 87 m/s C. 79 m/s D. 94 m/s E. 67 m/s20. A 4.2-kg object, initially at rest, “explodes” into three objects of equal mass. Two of theseare determined to have velocities of equal magnitudes (5.0 m/s) with directions that differby 90°. How much kinetic energy was released in the explosion? A. 70 J B. 53 J C. 60 J D. 64 J E. 35 J