Logger Pro Video Analysis of Our Pumpkin Drop

After logging on:

  1. Open Logger Pro from Desktop shortcut icon, or start menu, or All programs/Vernier Software/Logger Pro…
  2. From top pull-down menu: Insert: Movie after opening Logger Pro. DO NOT “OPEN” a MOVIE.
  3. My Computer/Collaborate/Staff _Student/dapickard/Videos/Pumpkin Drop for Logger Pro/
  4. Choose a “large” pumpkin video. (Later you will use this same procedure to analyze a “small” pumpkin video.)
  5. Adjust video window to fill most of the screen but leave a bit of space on the right side.
  6. Right click on movie image then on pop-up menu: to get “Movie Options”
  7. SetAdvance the movie2 frames after adding new point.
  8. Set with check  “First VA point defines movie time zero.”
  9. Play movie until pumpkin drop begins, then adjust video with rewind and forward buttons to the frame where you are sure hands are no longer holding the pumping and it has just begun to drop.
  10. Toggle on the Menu Bar on bottom right by clicking on red dots and 
  11. From that menu bar on right, click horizontal yellow rulertool to Set scale.
  12. Draw from the top to the bottom over 4 black lines/four meter squares of the background. Note, careful placement is critical for best results. This should be straight down slightly to the side of where the pumpkin will drop. Set the scale toa distance of 4.00 meters.
  13. From the menu bar on right click Add Pointtool icon.
  14. Add data points marking the position over time of the falling pumpkin by placing the crosshairs in the center part of pumpkin as close as you can to moment it is let go, (place points in the darkest, middle bit of orange if the pumpkin starts to blur in the frame), place your last point just as the pumpkin hits the floor.
  15. Right click on a white area of the graph, “Move to Back” to move movie image, to reveal a graph.This will be your graph of Position (distance) over Time. LoggerPro will label this negative indicating that the as the pumpkin fell (not gained) from its original position.
  16. Manually adjust the maximum and minimum values on each axis if needed to best scale and illustrate your data points.
  17. Copy and paste this position/time graph into aMSWord Doc for your group.
  18. Go tothe top pull-down menu and choose Insert
  19. Insert: Graph
  20. This will be a Velocity/Time graph
  21. On your Velocity/Time use linear fit to calculate the acceleration of the pumpkin during free fall in m/s/s. Take most of the graphed points but not first point (as the pumpkin’s motion might be influence by the person letting go of it) and don’t include the last point as the pumpkin stops moving as it hits the ground.
  22. Cut and paste this velocity/time graph with analysis into your MSWord Doc.
  23. Add titles to make sure you know which of your four graphs represent a large pumpkin and which two graphs represent the small pumpkin. Note each pumpkin will have one position/time graph and one velocity/time with accelerating calculation visible.
  24. Save your MSWord doc and print a copies of these graphs for your group.

\\CNOCMF04\Staff_P$\dapickard\My Documents\Fall 2012\Logger Pro Video Analysis intro.docx