Click the far right button in the movie player. This action will open up the video analysis tools, which appear on the right side of the movie player. A graph will also be displayed. If necessary, resize and move the graph to the right of the movie. By default, the graph will display both the x and y positions versus time. For this tutorial you will analyze the y position only. To set that up, click the y-axis label of the graph and then click "Y". The y axis will now show "Y" only. Click the Play button, and just before the ball leaves Dave's hand, click the Stop button. Click the Next Frame button and advance the movie until the ball has just left his hand. Click the Add Point button (second from the top). Move your mouse over the movie and use the cross hairs to identify the top of the ball (the top is easier to find than the middle!). Click once. Notice that a mark is left on the screen, and the movie advances one frame. Mark the top of the ball again and repeat this process until the ball almost hits the floor. Click the movie Play button to see the ball move through the air, and watch the trail of its horizontal and vertical position. The graph shows vertical position vs. time Now set a scale for the analysis. When the video was made, a two-meter stick was placed in the black part of the floor next to the basketball court. Click the Set Scale button, which is the fourth button from the top of the movie player on the right side. Now click and drag the mouse from one end of the meter stick to the other end. A pop-up dialog box will appear. Change the default of "1" for the Distance to "2." The "m" for the unit of measure is correct, so click OK. If you are familiar with curve fitting, fit a quadratic to the graph. The magnitude of the coefficient of the time? should be close to g/2, or about 4.9 m/s2. How close is it? 47/73 (1.304. 4.279) 01.547 Auto Fit for: VideoAnalysis | Y Y = A*t 2+Bt+C A: -3.783 +/- 0.02641 B: 5.090 +/- 0.04400 C: 1.768 +/- 0.01574 Correlation: 0.9997 RMSE: 0.01761 m 0.5 1.0 1.5 Time (s) O