Lecture 2 PowerPoint - Today Graphs Uniform motion constant...

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Today Graphs Uniform motion – constant velocity Motion with constant acceleration Examples with kinematic equations One misconception I would like to eradicate: A fuzzy notion of position & velocity & acceleration all mashed into an undifferentiated idea of 'motion'. Tuesday, 11 September, 12
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Individual Activity Write on a piece of paper (3 min): 1. People and things that are of real value to you. 2. People and things that make you happy. This is for you – you don't need to share this information with your group or anyone else. Tuesday, 11 September, 12
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Simulation: Moving Man Displacement, velocity, and acceleration are vectors . Vectors have magnitude and direction. In one dimension, we distinguish direction by using positive and negative signs . These are taken with respect to a reference frame (coordinate system). Tuesday, 11 September, 12
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Vectors and Scalars Displacement: Vector pointing from the initial to the final position: (“Net distance with direction”.) Important: Displacement is not equal to the distance traveled. Why? Average Speed : Distance traveled in time t. v = distance/time a scalar Average Velocity: v = displacement/time a vector Acceleration: a = velocity/time a vector Tuesday, 11 September, 12
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“Rushing, quickly going nowhere” flickr: All rights reserved by Josh Liba Text quickly (=high speed) going nowhere (=no change in final position) Tuesday, 11 September, 12
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Worksheet 1 – Part 2d When an object is slowing down (deceleration), what happens? A) There is no acceleration. B) There is not enough acceleration.
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