Newton's Laws of Motion are super important for understanding how things move and how they interact with forces, especially friction. These ideas are key parts of classical mechanics, which is the study of motion.

1. First Law (Inertia)
This law tells us that if something is not moving, it will stay still. If something is moving, it will keep moving at the same speed and in the same direction unless a force makes it change. For example, a book on a table won't slide off until you push it. In this case, friction is what keeps the book from sliding.

2. Second Law (F=ma)
This law helps us figure out how strong a force is. It says that the force acting on an object is the object's mass times how fast it is speeding up or slowing down (we write it as $F=ma$). When something slides down a hill, the force that moves it is the difference between gravity pulling it down and friction trying to stop it. If friction is really strong, the object won't speed up as much.

3. Third Law (Action-Reaction)
This law explains that for every action, there is a reaction that is equal in strength but opposite in direction. So, if you push a block across a floor (that's your action), the block pushes back against you with the same force (that's the reaction). Knowing this helps us calculate the force of friction between surfaces. We can use the formula $F_{\text{friction}} = \mu N$, where $\mu$ is a number that shows how slippery the surfaces are and $N$ is the force pushing them together.

In short, Newton’s laws explain how things move. They also help us understand the role of forces, like friction, in that movement.