# 01. Model Specifies

- Page ID
- 439

[ "article:topic", "authorname:dalessandrisp" ]

Model Specifics

For our third pass through the study of mechanics, we will finally allow forces to vary in both magnitude and direction. Peeling away this approximation requires us to utilize a new mathematical tool, calculus. We will still, however, require the following two approximations.

**The object's size and shape are unimportant.**

**The object is classical.**