Guiding question?
Which is better: data analysis or graph matching?
In this activity you will gather data of a falling ball from video analysis software and then analyse it using a spreadsheet in two ways; data analysis and graph matching.
Watch the video Balltossout.mov and then upload it to Tracker. Set the axis. We will only be investigating the vertical component so the y-axis can be anywhere. Try to set the x-axis to start as the ball leaves the guy’s hand. Set the
Track the ball manually. Use the zoom to get it on the same spot each time. Then cut and paste your data into your spreadsheet (only the vertical data).
Was cm a good choice for the distance unit? How could it be changed?
Data analysis:
Set up your table to find the mid pt of the time intervals and the velocity from the data.
What formulas would you use???
Plot the Velocity vs time graph
Now repeat the process to find the acceleration…
Now use the trend line options for all graphs. What values do they give for g? which method is the most reliable or would a combined method be better?