Unit 2 is "Vector algebra and statics". I opened this thinking "Ah yup. I know vectors. Easy". I see "dot product" and "cross product" explained in it, and considered how crazy-basic this unit must be. I saw arrows on force diagrams. Yup. Simple. This will be a non-unit. A breeze. Though it turns out... after getting a few pages in, I've not been asked to present vectors quite like this before, and these force diagrams look a lot different to the ones I remember somehow. Seems I do actually have to read this all carefully... I'm also used to using vectors in programming, so the fact that every vector I'm given is unnormalised also makes me feel dirty. Right, we'll see how this goes then... :/