frictionpaper - Megan Thie SME 301 Friction Friction is an...

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Megan Thie SME 301 November 20, 2007 Friction Friction is an often overlooked concept in our physical world. Friction is used in our everyday life. It affect how we transport ourselves, walking or even driving a car. Without friction, many living things and inanimate objects would simply slip and slide all over the place. Big Idea One Friction is the force between two objects rubbing together . Friction opposes motion. It slows down objects already in motion and provides a resisting force that makes it difficult for stationary objects to go into motion. There are two things that affect the amount of friction. First, the surface of all objects has a texture comprised of tiny bumps, lumps, and ridges, even if the object may appear smooth to the naked eye. The very tiny bumps touch and interact with each other when two objects come into contact, rubbing against each other. Two objects, for example an eraser and a piece of paper, Each of these has texture affected by the atoms that each are composed of, because they are matter and matter is made up of atoms. As previously stated, these individual atoms make bumps and ridges that are invisible. When the bumps of the pencil and the bumps of the paper rub against and catch on one another, friction is created. Heat is produced when the rubbing of the molecules makes them move faster and heat is created. Big Idea Two It has already been established that the bumps, lumps, and ridges of an object’s surface cause friction. The degree of these bumps, lumps, and ridges, has a lot to do with causing friction, and in what amount. Thus, friction is high if the surfaces are dry and rough, and low if the surfaces are smooth and wet . Smooth surfaces have less and less pronounced bumps and ridges which rub against each other less. Thus, they have less
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This note was uploaded on 04/27/2008 for the course SME 301 taught by Professor Holcomb during the Spring '08 term at Michigan State University.

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frictionpaper - Megan Thie SME 301 Friction Friction is an...

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