Motion Graphs. Position is on the vertical axis Time is on the horizontal axis Slope (rise/run or...
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Transcript of Motion Graphs. Position is on the vertical axis Time is on the horizontal axis Slope (rise/run or...
Position vs. Time Graphs
Motion Graphs
Position vs. Time Graph Properties
Position is on the vertical axis Time is on the horizontal axis Slope (rise/run or Δy/Δx) = velocity A curved graph shows acceleration
Velocity = Slopeposition
time
position
time
positive velocity negative velocity
Acceleration
Positive acceleration(smile!)
Negative acceleration(frown!)
Describe the motion represented by this position-time graph.
Velocity-Time and Acceleration-Time Graphs
Motion Graphs
Velocity vs. Time Graphs
Velocity is on the vertical axis Time is on the horizontal axis Slope is acceleration Area between the graph and the
time-axis is displacement Use triangles and rectangles to find the
area
velocity
time
A ball thrown up in the air (initial +v), slowing down, stopping at it’s peak (zero velocity), and coming back down (-v). Constant negative acceleration.
Determine the displacement from 2 to 5 seconds.
velocity
time
50 m/s
5 sec2 sec
20 m/s
acceleration
time (sec)
2 m/s2
-4 m/s2
5020 80
A car is moving with a constant acceleration of +2 m/s2 for 20 seconds and then travels at a constant velocity for 30 seconds and then travels with a constant acceleration of -4 m/s2 for 30 seconds.