# 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.