XY Motion on an Air Table
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Frame from the QuickTime movie showing the path of the puck. Larger Picture |
Position versus time data from VideoPoint. See Data and Commentary for more graphs. |
| Abstract |
Puck moves in 2D, colliding with wire boundaries. Analysed with VideoPoint.
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| Portable | Yes | |
| Principles Illustrated |
Motion in 2 D, data analysis, position, velocity, and acceleration.
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| NCEA & Science Curriculum | ||
| Teacher Guide |
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| Instructions | The camera is mounted well above the table, at a height of about three meters. The camera is connected to a computer with FireWire running VideoPoint Capture and VideoPoint Analysis or similar software. The puck should move moderately fast or there will be large errors in the velocity and acceleration due to small changes in position. The numerical derivatives used to calculate velocity and acceleration distort the data somewhat. Note: When using VideoPoint delete the first data point. The time for this data point is incorrectly assigned the value t = 0 seconds. The distance from the edge of the table to the mark is 1 meter, as shown in this scale photo. This can be used to scale the movie in VideoPoint. Definitely need two blowers. Note that the collisions are not very elastic. This demonstration is done interactively as a warm-up exercise for a Physics 114 Lab Exercise at Victoria University. Instructions for Phys 114. |
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| Related Resources | ||
| Example Data | ||
| References |
PIRA 1N40.20
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| Credits |
This teaching resource was developed with support from |
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| Copyright |