 Hi, welcome to Unit 1 of Mechanics 1. In this unit we're going to look at statics, things that are not accelerating, so either they're moving at a constant rate or not at all. Now most things aren't truly static, even a bridge moves ever so slightly from one second to the next, but in order to get a handle on the basics it's helpful to match in objects at rest. We'll begin with an overview of vectors, and then we're going to learn to the most important terms in mechanics, forces and moments. Now both can influence the motion of an object. Force causes an object to accelerate, and you can think of that as a pushing or pulling influence in a particular direction. A moment on the other hand causes an object to rotate or spin, so for that think of a wrench tightening a bolt. The action of the wrench on the bolt is an example of a moment. These ideas are pretty simple, but they have applications and all kinds of engineering projects and the problems that might arise from those projects. In this unit we're really setting the stage for some of the more advanced concepts that will help you to solve some of those problems. Now before we begin, just a couple things I'd like you to remember. First, this unit should take about 40 hours to complete, and second, there is an end of unit assessment. It's not graded, but it will help a lot toward passing your final exam. Good luck.