# Collisions

Collision simulations in python.

Usage:

```collision [cart | pol] [cart | pol] velocity_1 velocity_2```

where

   - ```velocity_1``` is the velocity of the first particle, in the form
     ```"r theta"``` if the input vector type is polar, or in the
     form ```"x y"``` if the input vector type is cartesian

   - ```velocity_2``` is the velocity of the second particle, in the
     form ```"r theta"``` if the input vector type is polar, or in
     the form ```"x y"``` if the input vector type is cartesian

The program outputs the velocities of the particles after the
collision, in the form specified by the output vector type.