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Unformatted text preview: Newtons 2 nd Law of Motion Part 2: Friction Suzannah Bloom Lab partner: Drew Hopely TA: Sky Bauman Date of experiment: 9/25/07 Date of submission: 10/2/07 Objective: To observe and analyze what effects changing the normal force has on the frictional force and to experimentally determine the kinetic and static coefficients of friction on a wooden block. Introduction: What exactly is friction, and what are its effects in everyday scenarios? To put it simply, friction is what allows us to walk along the sidewalks, accelerate cars on the road, strike matches, snap our fingers, and much more. Although friction is a part of everyday life, understanding and analyzing what goes on with friction on a microscopic scale becomes much more complex. Friction exists due to the chemical makeup of different materials, and how those different materials interact with one another. How rough a material is, and how weak chemical bonds behave with each other is one way to analyze friction, but friction can also be modeled in a simpler way. For example, think about trying to pull a heavy object say, a queen size bed, across a strip of asphalt. Now consider pulling the same bed across a strip of ice. Obviously pulling the bed across the ice will be considerably easier. This is du to the fact the ice and the asphalt have quite different chemical makeup. Therefore, how two the ice and the asphalt have quite different chemical makeup....
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