AP_Physics_B_-_Graphical_Analysis_of_Motion (1)

# AP_Physics_B_-_Graphical_Analysis_of_Motion (1) -...

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Graphical Analysis of  Motion AP Physics B

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Slope – A basic graph model A basic model for understanding graphs in physics is SLOPE . Using the model - Look at the formula for velocity. Who gets to play the role of the slope? Who gets to play the role of the y-axis or the rise? Who get to play the role of the x-axis or the run? What does all the mean? It means that if your are given a Displacement vs. Time graph, to find the velocity of an object during specific time intervals simply find the slope. t x v Run Rise slope = = Velocity Displacement Time
Displacement vs. Time graph What is the velocity of the object from 0 seconds to 3 seconds? The velocity is the slope!

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Displacement vs. Time graph What is the velocity of the object from 7 seconds to 8 seconds? Once again. ..find the slope! A velocity of 0 m/s. What does this mean? It is simple. ...the object has simply stopped moving for 1 second.
Displacement vs. Time graph What is the velocity from 8-10 seconds? You must remember! To find the change it is final - initial. The answer is negative! It is no surprise, because the slope is considered to be negative. This value could mean several things: The object could be traveling WEST or SOUTH. The object is going backwards - this being the more likely choice! You should also understand that the slope does NOT change from 0-3s , 5 to 7s and 8- 10s. This means that the object has a CONSTANT VELOCITY or IT IS NOT ACCELERATING.

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Example It is very important that you are able to look at a graph and explain it's motion in great detail. These graphs
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## This note was uploaded on 11/18/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

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AP_Physics_B_-_Graphical_Analysis_of_Motion (1) -...

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