Types of Friction What is friction Friction is

Types of Friction

What is friction? �Friction - is a force that opposes motion between two touching surfaces.

Friction �Friction is dependant on the texture of both surfaces. �Less friction means it is harder to stop.

Examples of Friction �Ex. 1: If a car needs to stop at a stop sign, it slows because of the friction between the brakes and the wheels. �Ex. 2: If you run down the sidewalk and stop quickly, you can stop because of the friction between your shoes and the cement.

� http: //www. bbc. co. uk/schools/scienceclips/ages/8 _9/friction. shtml � https: //www. youtube. com/watch? v=U 5 f 7 Syv. HUac

Sliding Friction �Sliding friction - refers to the resistance created by two objects sliding against each other. �Ex. Rubbing both hands together to create heat.

Rolling Friction �Rolling friction - is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface.

Fluid Friction �Fluid friction -is a kind of friction that occurs in fluids that are moving relative to each other. �Air resistance is a type of fluid friction.

Static Friction �Static friction - is the type of friction that prevents an object from moving when a force is applied. �It prevents two surfaces from sliding past each other.

Videos on types of friction � https: //www. youtube. com/watch? v=9 Xt. GJXVn. Qxk � https: //www. youtube. com/watch? v=qy-EJRDyt-A