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AS3/ Expt-g/ Boren
AS3/ Expt-g/ Boren
AS3/ Expt-g/ Boren
AS3/ Expt-g/ Boren
AS3/ Expt-g/ Boren
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AS3/ Expt-g/ Boren

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Transcript

  • 1. g – LINEAR AIR TRACK 10.1 2009
  • 2. Apparatus required <ul><li>A linear air track, blower, trolley, two light gates, QED unit and power supply, stopwatch, laboratory jack, wooden blocks, ruler </li></ul>
  • 3. The diagram of the experiment A
  • 4. Precedure <ul><li>Set up the apparatus as shown in the diagram with one end of the track on a wooden block and the other on an adjustable laboratory jack. Using two light gates placed about a metre apart across the track measure the acceleration (a) of the trolley down the track for a measured angle of inclination A. </li></ul><ul><li>If light gates are not available simply use a stopwatch to measure the time (t) taken for the trolley to travel a distance s down the track from rest. Then calculate a from s = ½ at2. </li></ul><ul><li>Repeat the experiment for a series of values of A, keeping the angle less than 15o. </li></ul>
  • 5. How to determine the number of g ? <ul><li>The time which the trolley passes between two light gate is denoted as t. </li></ul><ul><li>According the equation s=1/2 a t 2 . In the equation s=1 , so a=2/t 2 . At the same time , because a=g sinA , so g sinA=2/t 2 , </li></ul><ul><li>So g=2/(t 2 sinA). </li></ul>

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