A ball of mass 0.200 kg has a velocity of 1.58 m/s; a ball of mass 0.310 kg has a velocity of -0.405 m/s.They meet in a head-on elastic collision.
(a) Find their velocities after the collision.
m/s (first ball)
m/s (second ball)
(b) Find the velocity of their center of mass before and after the collision.
m/s (before)
m/s (after)