In this picture the red ball collided into the purple ball in a bouncy collision. In Physics we are learning about collisions and the conservation of momentum. When an object hits another object the momentum is conserved. This type of collision is called an inelastic collision. The collision in the picture shows a two-kilogram ball hitting a stationary one-kilogram ball. The red ball hit the purple ball and glanced off to the side. The purple ball moved straight back. This collision is a perfect example of a two dimensional collision.
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