A 2.0 o particle moving at 8.4 m/s makes a perfectly elastic head-on collision with a resting 1.0 g object. (a) Find the speed of each after the collision. 2.0 g particle m/s 1.0 g particle m/s (b) Find the speed of each particle after the collision if the stationary particle has a mass of 10 g. 2.0 g particle m/s 1.0 g particle m/5 (c) Find the final kinetic energy of the incident 2.0 g particle in the situations described in (a) and (b). KE in part (a) KE in part (b) In which case does the incident particle lose more kinetic energy? case (b) case (a)