Step 2 turn on the air supply machine and adjust the

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Step 2.Turn on the air supply machine and adjust the power button so that your glider moves without friction. You are sharing your air supply with another team so make sure both teams are satisfied with the setting of the supply before moving forward with your experiment. Step 3.Level your track using the adjustable legs. Place the glider at the centre of the track. If the glider moves one way or the other, adjust the track to raise or lower one end. When the air track is properly leveled, the glider should be almost stationary (there is always a little bit of turbulence). Step 4.Make sure that the glider stopper (the velcro) is wrapped around the air track about 10 cm in front of the motion detector. Step 5.Make sure your motion detector is set to track: . The detector head pops up to allow this manipulation. Step 6.Align the motion sensor and make sure it is detecting the glider’s position wherever it is along the track. a.Insert a 1 cm aluminum disc under the front leg of the air track. b.In the Logger Promenu, go to Experimentand then Data collection. Set the length of the measurement to 50 sec. Adjust the number of samples per second to 20 and then click Done. c.Put the glider one meter in front of the sensor. Ensure the round disc attached to the glider is facing the motion detector. This disc is used to increase the surface area that the detector sees. d.Hit Collectand release the glider. Make sure that the sensor is reading the position of the glider correctly as it accelerates down the track. Step 7.Keep the track tilted using the 1 cm aluminum disc. Starting with the glider at the bottom of the track, i.e., near the detector, practice launching the glider with your finger so that it slows to a stop at least 1 m from its initial position before it returns to the initial position. Once you are good at it, hit Collectand push the glider up the track. Be sure to catch it once it has returned to its starting position. Repeat, if necessary, until you get a trial with a smooth position-time graph. Step 8.Add the following titles to your graphs: - Graph 1: Position vs. time on an incline - Graph 2: Velocity vs. time on an incline Step 9.Perform a linear fit to the portion of the velocity vs. time graph where the cart was moving freely. Select the graph, click Analyzethen Linear Fit. Move the cursors to select the free-motion portion of the graph.
Exp. 2 Motion on a linear air track 4 Step 10.The position-time graph of an object that is constantly accelerating should appear parabolic. Use the Curve Fitfunction of your data analysis program to fit a quadratic equation to that portion of the position vs. time graph where the cart was moving freely. Select the graph, click Analyzethen Curve Fitand choose the quadratic equation. Step 11.Adjust the time axis on both graphs in order to only show the free-motion section (plus a few seconds before and after).

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