# UQAWA2 - Heather Banks General Physics November 5th 2010...

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Heather Banks General Physics November 5 th , 2010 UQAWA #2-Braking Description of Phenomenon: There are two different types of brakes a car can have either normal (anti-lock) or locked brake systems. The normal braking system allows the disk to continue rotating while the pad and caliper attach to it to rub on it in order to stop your car. In the locked braking system, the disk and the pads do not move in relation to one another. The normal braking system is good for stopping your car while the locked braking system is bad at it. Relevant Quantities: Name Symbol SI Units Description Kinetic energy KE = × J kg m2s 2 Energy an object has when it is in motion. Total Work W Total = × J kg m2s 2 The total amount of work done on an object. Mass m kg The space an object takes up. Velocity V ms The change of an object’s position over time. Kinetic Friction f k = × N kg ms2 Friction encountered when two objects slide against one another with a finite relative speed. Static Friction f s = × N kg ms2 Friction between two objects that are in contact/sliding with one another but not moving.

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