Chapter02

# Chapter02 - Chapter2:Motionalonga StraightLine 1. Velocity...

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Chapter 2 : Motion along a  Straight Line

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1. Displacement and Average  Velocity Position : the location of an object Displacement : the direction and distance of the shortest path between an initial and final position: Velocity : speed and direction, unit : m/s x = x f - x i x , x i , x f
Average velocity : displacement divided by elapsed time. v ave = x 2 - x 1 t 2 - t 1 = x t

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Opposite direction of motion Graphical analysis average speed = slope between two points
2. Instantaneous Velocity v x = lim t 0 x t = dx dt

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3. Average and Instantaneous  Acceleration Acceleration : change in velocity, unit m/s 2 Average acceleration a ave = v 2 - v 1 t 2 - t 1 = v t
Instantaneous acceleration a = lim t 0 v t = dv dt = d 2 x dt 2

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4. Motion with Constant  Acceleration Motion with constant positive acceleration results in steadily increasing velocity.
Equations for constant acceleration motion

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Chapter02 - Chapter2:Motionalonga StraightLine 1. Velocity...

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