1-D Collisions
We can divide the collisions into three cases:
1. The two objects can bounce off of each other without any Elost. This is called an elastic collision. This means Elost = 0.
2. The two objects can stick to each other. This means v1f = v2f .
3. The objects can be deformed but still not stick to one another. No special information is available in these cases.