In a game of pool, the cue ball strikes another

In a game of pool, the cue ball strikes another ball of the same mass and initially at rest. After the collision, the cue ball moves at 3.50 m/s along a line making an angle of 22.0o with the cue ball's original direction of motion, and the second ball has a speed of 2.00 m/s. Find

(a) The angle between the direction of motion of the second ball and the original direction of motion of the cue ball and

(b) The original speed of the cue ball.

(c) Is kinetic energy (of the centers of mass, don't consider the rotation) conserved?

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