In Sports, saying a team has "momentum" is really just an over-used cliche that means things are currently going well for that team. But in Physics, momentum is one of the most enduring principles throughout all areas and to say an object has momentum is a useful and important way of describing its motion. At a very simplified level, momentum can be thought of as a way of quantifying the inertia of an object. In this unit, we will examine what Newton termed as "a quantity of motion" and will look at the relation between an objects momentum and the force needed to change that. We will look at conservation of momentum as an important law in Physics and we will look at different types of collisions between objects and how these are characterized. In the interest of full disclosure, we will only be examining momentum as it relates to linear motion of objects.