there are two 0.17 kg billiard balls. the white ball (v=0.80m/s) strikes the stationary black ball (v=0.60m/s

Question

and moves off at an angle 60.0 degrees north of east. the black ball moves off at an angle 48.2 degrees south of east. what is the whites ball's initial velocity??

Yes the ball became .60 m/s after it was hit

Answer 1

If the black ball is stationary, how can it have a velocity of 60 m/s? Are the two velocities the velocities after the collision?