Chapter03

Chapter03 - Chapter 3: Acceleration and Newtons Second Law...

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Chapter 3: Acceleration and  Newton’s Second Law of  Motion

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1. Position and displacement Position : the location of an object Displacement : the direction and distance of the shortest path between an initial and final position: f i r r r ∆ = - r r r
Example of the displacement

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Vector subtraction A r B r A B - r r Draw a vector from B end to A end
2. Velocity Average velocity Average velocity does not convey detailed information about the motion during the corresponding time interval t . unit of velocity : f i av f i r r r v t t t - = = - r r r r

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Instantaneous velocity 0 lim t r v t = r r 0 lim x t x v t = 0 lim y t y v t = In component form
Relationship Between Position and Velocity on Graphs of x ( t ) and v ( t ) Velocity on x-t graph

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Displacement on v-t graph displacement = area under the curve

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Problem 3.19) A graph is plotted of the vertical velocity component of an elevator versus time. (a) How high is the elevator above the starting point ( t = 0) after 20 s have elapsed? (b) When is the elevator at its highest location above the starting
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This note was uploaded on 09/10/2008 for the course PHYS 2205 taught by Professor Damazilu during the Fall '08 term at Virginia Tech.

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Chapter03 - Chapter 3: Acceleration and Newtons Second Law...

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