(Solved): Two billiard balis of equal mass undergo a perfectly elastic head-on collision: Part A If one ball' ...

Two billiard balis of equal mass undergo a perfectly elastic head-on collision: Part A If one ball's initial speed was \( 2.20 \mathrm{~m} / \mathrm{s} \), and the other's was \( 4.00 \mathrm{~m} / \mathrm{s} \) in the opposite drection, what wal be their velocities after the colision? Enter your answers numericalfy separated by a comma. Enter positive value if the direction of the velocity is the same as the direction of the initial velocity of the first ball, and negative value if the direction of the veloeity is opposite to the direction of the initial velocity of the firat ball.