Purpose: To analyze the motion of a projectile
Materials:
- lacrosse ball
- meter stick
- laptop webcam
- Tracker Video Analysis Software
Procedure:
- Lay meter stick down across the table
- Set up camera to fit the meter stick
- Throw the ball the distance of the meter stick in frame of the camera.
- Upload the video to tracker and analyze the projectile motion using a position versus time graph (both x and y axis’).
Data and Data Analysis:
Click to access projectile-motion.pdf
Conclusion:
The tossed lacrosse ball did indeed fit the principles of projectile motion. It was not a perfect curve because when I was clicking the points to track the ball, the software was not specifically aligned to the center of the ball each time. But besides this, the delta-y vs. time graph represented a perfect trajectory and the delta-x vs. time graph represented a linear line.
michaeldudash Physics 
Nice job? How do you know your graph represents a perfect trajectory? What observations did you use to draw this conclusion? Likewise, for the x-graph? What can you conclude about horizontal/vertical accelerations?