In a game of pool, the cue ball strikes another ball of the similar mass and initially at rest. After the collision, the cue ball moves at 3.30 m/s along a line making an angle of18.0 degree with its original direction of motion, and the second ball has a speed of 1.90 m/s.
(a) Obtain the angle between the direction of motion of the second ball and the original direction of motion of the cue ball.
°
(b) Calculate the original speed of the cue ball.
m/s