Before attempting any two-dimensional relativistic collisions, do this classical (i.e., non- relativistic) two-dimensional collision problem: Two balls collide elastically. Ball 1 has a mass of 0.70 kg and an initial velocity of 10 m/s in the +x-direction. Ball 2 has a mass of 0.90 kg and is initially stationary. After the collision, ball 1 is moving at a 30° angle above the horizontal. Find the speeds of each ball and the direction of ball 2 after the collision.

Before attempting any two-dimensional relativistic collisions, do this classical (i.e., non- relativistic) two-dimensional collision problem: Two balls collide elastically. Ball 1 has a mass of 0.70 kg and an initial velocity of 10 m/s in the +x-direction. Ball 2 has a mass of 0.90 kg and is initially stationary. After the collision, ball 1 is moving at a 30° angle above the horizontal. Find the speeds of each ball and the direction of ball 2 after the collision.