What are 4 ways forensics uses physics?

One possible way is that one could use physics to describe how an object collided with another object (body, head, etc.). Carbon dating is another for sure, which is were they look at carbon-14 and use its half-life to predict ones age. Perhaps another is they could use water dynamic and how water erodes a body or such.

A big maybe: Being able to tell the age of a piece of clothing by the change in color dies due to light.