Acue ball of mass m1 = 0.305 kg is shot at another billiard ball, with mass m2 = 0.545 kg, which is at rest. the cue ball has an initial speed of v = 5.5 m/s in the positive direction. assume that the collision is elastic and exactly head-on. part (a) what is the horizontal component of the billiard ball's velocity, v2f, after the collision, in meters per second? a numeric value is expected and not an expression part (b) what is the horizontal component of the cue ball's final velocity, v1f in meters per second? a numeric value is expected and not an expression