Phy Ch1 Summary - Chapter 1 Concepts of Motion Particle...

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Chapter 1: Concepts of Motion Particle model: dots represent the center of the objects mass. Shows the object accelerating (distance between dots increasing) Shows Constant velocity (distance between dots constant) Shows object decelerating (distance between dots decreasing) Scalar quantities have only magnitude Vectors have both magnitude and direction Adding vectors General rule is “Tip to tail, tip to tail” To subtract vectors draw –B or –A which is the same length of the vector in opposite direction. Dr = rf – ri Draw a Parallelogram by drawing the same vectors on opposite sides. Delta R is basically change in velocity.
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The change in r can be shown in a coordinate system too. Average speed = Distance/Time Or Delta distance/ Delta time Careful of Units m/s km/hr Speed is a scalar (1D) quantity. Velocity is a vector (3D) quantity Velocity is rate of change of displacement: Change in displacement/ Change in time Velocity motion diagrams show change in speed and direction. Doing Problems:
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This note was uploaded on 04/28/2008 for the course PHY 132 taught by Professor Rijssenbeek during the Spring '04 term at SUNY Stony Brook.

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Phy Ch1 Summary - Chapter 1 Concepts of Motion Particle...

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