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Original file (819 × 2,751 pixels, file size: 363 KB, MIME type: image/jpeg)
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Summary
| Description |
An initially-stationary object which is allowed to fall freely under gravity drops a distance which is proportional to the square of the elapsed time. This image, spanning half a second, was captured with a stroboscopic flash at 20 flashes per second. During the first 1/20th of a second the ball drops one unit of distance (here, a unit is about 12 mm); by 2/20ths it has dropped at total of 4 units; by 3/20ths, 9 units and so on. To take the picture, the ball - about the size of a tennis ball - was suspended by a short length of black thread and was released as the shutter was opened and the flash triggered. The shutter remained open for the whole of the half-second period, during which time the flash fired multiple times to capture the ball at 1/20 second intervals. |
| Date | |
| Source | Own work |
| Author | MichaelMaggs |
| Other versions |
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Dark background replaced with black; scale added; levels & contrast.
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Assessment
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This image has been assessed under the valued image criteria and is considered the most valued image on Commons within the scope: Object in free fall.. You can see its nomination here. |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:31, 20 October 2007 | | 819 × 2,751 (363 KB) | MichaelMaggs | {{Information |Description=An initially-stationary object which is allowed to fall freely under gravity drops a distance which is proportional to the square of the elapsed time. This image, spanning half a second, was captured with a stroboscopic flash op |
| 12:18, 20 October 2007 |  | 723 × 2,427 (284 KB) | MichaelMaggs | {{Information |Description=An initially-stationary object which is allowed to fall freely under gravity drops a distance which is proportional to the square of the elapsed time. This image, spanning half a second, was captured with a stroboscopic flash op |
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