A cue ball of mass m1 = 0.39 kg is shot at another billiard ball, with mass m2 = 0.54 kg, which is at rest. The cue ball

[answerhappygod]

A cue ball of
mass m1 = 0.39 kg is shot
at another billiard ball, with
mass m2 = 0.54 kg, which is
at rest. The cue ball has an initial speed
of v = 9.5 m/s in the positive
direction. Assume that the collision is elastic and exactly
head-on.
Write an expression for the horizontal component of the billiard
ball's velocity, v2f, after the collision,
in terms of the other variables of the problem.
What is this velocity, in meters per second?
Write an expression for the horizontal component of the cue
ball's velocity, v1f, after the
collision.
What is the horizontal component of the cue ball's final
velocity, in meters per second?