A white billiard ball with mass mw = 1.43 kg is moving directly to the right with a speed of v = 3.42 m/s and collides elastically with a black billiard ball with the same mass mb = 1.43 kg that is initially at rest. The two collide elastically and the white ball ends up moving at an angle above the horizontal of ?w = 42.0° and the black ball ends up moving at an angle below the horizontal of ?b = 48.0°.
1) What is the final speed of the white ball?
2) What is the final speed of the black ball?