Position vs Time Graphs

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Presentation transcript:

Position vs Time Graphs

Position vs Time Graphs Position vs Time Graphs can show motion…..change in position as a factor of time These graphs can describe 3 types of movement: Forward Reverse No Movement

A … Forward: Starts at home (origin) and goes forward “moderately” 1 – D Motion A t A … Forward: Starts at home (origin) and goes forward “moderately”

d B 1 – D Motion t B …No Motion: Not moving (position remains constant as time progresses)

d 1 – D Motion t C C …Reverse: Turns around and goes in the other direction “moderately”, passing up home (origin)

A … Forward: Starts at home (origin) and goes forward “moderately” B C 1 – D Motion A … Forward: Starts at home (origin) and goes forward “moderately” B …No Motion: Not moving (position remains constant as time progresses) C …Reverse: Turns around and goes in the other direction “moderately”, passing up home

Slope and PT Graphs The slope of the lines in the PT graphs=the speed of the objects The steeper the slope, the faster the object moves Why? Faster = more distance(d or P) covered in same time (t). Slower = less P covered in same time (t). What would the slope of the last car need to look like if it sped up quickly? Slowly?

Unchanging Slope This position vs time graph shows a constant velocity because the slope is unchanged. It covers 10 m every second.

Changing Slope This position vs time graph shows a constant acceleration because the slope is changing. The distances covered are not equal among the times.

Check for understanding…… 1. What are the 3 movements a position vs time graph shows? 2. What can we use to describe the speed of the object in a position vs time graph? 3. Look at the graph to the right….which object is moving fastest and why? Slowest? Why? 4. What does constant acceleration look like on a position vs time graph? 5. What does constant velocity look like on a position vs time graph? 6. What does line E indicate E