If you have a billiard ball colliding with another stationary one causing both of them to move at an angle?

Question

To find the kinetic friction do I have to find kinetic energy for individual directions (N-S or E-W)

Answer 1

according to the conservation of momentum the second ball has the same momentum, though it depends on the angle at which the first ball collides with the second

also if you put English on the cue ball

if it is a solid shot, the cue ball can stop and transfer all momentum to the second ball

hope i could help

Answer 2

Studying kinetic friction could be done with just one ball. It would be a matter of how quickly it came to a stop on a level table (with no collision being part of the problem).

Did you accidentally combine parts of 2 different problems?

I can discuss either subject with you if you want to send an email.