Answer to Question #68205 in Mechanics | Relativity for Sam

Question

In the arrangement of the figure, billiard ball 1 moving at a speed of 3.7 m/s undergoes a glancing collision with identical billiard ball 2 that is at rest. After the collision, ball 2 moves at speed 3.2 m/s, at an angle of θ2 = 31°. What are (a) the magnitude and (b) the direction (angle θ1) of the velocity of ball 1 after the collision?