# What Happens When Billiard Balls Collide?

Firstly, it is important to note that the conservation of momentum plays a crucial role in determining the final outcome of the collision between billiard balls. In this scenario, the first ball moves at 50.0 cm/s after the collision, while the second ball comes to a complete stop.

When billiard balls collide, they transfer energy and momentum to each other. The direction and speed at which each ball moves after the collision depend on factors such as their masses, initial velocities, and the angle at which they collide.

In this specific example, the first ball ends up moving at 50.0 cm/s in a certain direction, while the second ball stops moving altogether. This outcome is a result of the transfer of kinetic energy and momentum between the two balls during the collision.

The final direction in which the first ball moves can be calculated using the initial velocities of the two balls and the angles involved in the collision. By applying mathematical formulas such as tanα = Dy/Dx, we can determine the final direction of the first ball's movement, as seen in the given answer of 53.13°.

Overall, the collision between billiard balls exemplifies the principles of physics, particularly in the context of momentum conservation and energy transfer. Understanding these dynamics can provide insights into the behavior of objects in motion and the interactions between them.