# Ash Lab 106 Friction.docx - Ashraf Siddique PHYS 102A-101...

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Ashraf SiddiquePHYS 102A-101Lab Partners: Jacob Mattheiss, Damian Zjawin, Max FinnOctober 23, 2017Lab 106: Static and Kinetic FrictionBackground:Friction is a force that always opposes the motion of an object. Friction can be dividedinto two different types. One is called static, and one is called kinetic. Static friction is a forcebetween two objects that are not moving relative to one another. For example, an object restingon a slope, but not sliding down the slope, is kept in its position by static friction. Static frictionmust be overcome to cause an object to move across a surface. Once enough force has beenapplied to an object, it will begin to slide across a surface and kinetic friction will then act on theobject. Kinetic friction occurs when two objects are moving relative to one another with oneobject sliding across the surface of the other and it opposes the motion of the object. Both typesof friction are described by different coefficients. These values are known as the coefficients of