Coefficient of restitution problem

[Samtheguy]

Homework Statement

The two identical steel balls A and B moving with initial velocities VA = 6 m/s and VB = 8 m/s collide, as shown in figure Q4. If the coefficient of restitution is e = 0.7, determine the magnitude and direction of the velocity of each ball just after impact.
(See Attachment, Question 4)

The Attempt at a Solution

Calculate the y-component of VA.
VA(y) = 6*cos(30) = -5.196 m/s (Since it is traveling in the -y direction)

e = (VB' - VA')/(VA - VB)

Where:

(VB' - VA') is the relative velocity of separation after impact (m/s)
(VA - VB) is the relative velocity of approach (m/s)
e is the coefficient of restitution

0.7 = (VB' - VA')/(-5.196 - 8)

0.7*(-5.196 - 8) = (VB' - VA')

-9.2372 = (VB' - VA')

Is this method correct so far? If so, I don't know where to go from here.

 

[Samtheguy]

Any help on this question would be great as I got this same question on an exam and I am wondering if I got the beginning right or not.