A cue ball initially moving at 3.2 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball's nal speed is...

A cue ball initially moving at 3.2 m/s strikesa stationary eight ball of the same size andmass. After the collision, the cue ball’s finalspeed is 1.4 m/s . Find the cue ball’s angle θ with respect toits original line of motion. Consider this tobe an elastic collision (ignoring friction androtational motion).Answer in units of◦