File:Falling ball.jpg
Jump to navigation
Jump to search
Size of this preview: 178 × 598 pixels. Other resolutions: 71 × 240 pixels | 143 × 480 pixels | 178 × 600 pixels | 819 × 2,751 pixels.
Original file (819 × 2,751 pixels, file size: 363 KB, MIME type: image/jpeg)
|
This is a featured picture on the Romanian language Wikipedia (| Description |
English: 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. Français :
Un objet en chute libre depuis une position fixe parcours une distance proportionnelle au carré du temps écoulé. Cette photo a été prise sur une période de 0,5 seconde avec un flash stroboscopique réglé sur 20 impulsions par seconde. La balle, de la taille d'une balle de tennis, était retenue pas un fil noir sectionne au moment ou l'exposition a commence et ou le flash produisit sa première impulsion lumineuse. Română: Un obiect staÅ£ionar lăsat în cădere liberă în câmpul gravitaÅ£ional al Pământului. Legea de miÅŸcare este o funcÅ£ie de gradul al doilea, poziÅ£ia la fiecare moment fiind egală cu pătratul timpului scurs de la începutul căderii. Imaginea a fost expusă timp de 500 de milisecunde, cu un flash stroboscopic, declanÅŸat cu o frecvenţă de 20 de flash-uri pe secundă. ÃŽn primele 50 ms, mingea cade pe o unitate de distanţă (unitatea de distanţă este de aproximativ 12 mm—distanÅ£a parcursă în 50 ms de un obiect lăsat liber în câmpul gravitaÅ£ional al Pământului de la o viteză iniÅ£ială de 0 m/s); după ce s-au scurs 100 ms, mingea a căzut 4 unităţi de distanţă; după 150 ms, mingea a parcurs 9 unităţi, ÅŸi aÅŸa mai departe.
Pentru realizarea imaginii, mingea (de dimensiunile unei mingi de tenis) a fost suspendată cu un fir negru şi a fost lăsată să cadă în momentul începerii expunerii şi odată cu primul bliţ. Aparatul a continuat să expună timp de o jumătate de secundă, timp în care bliţul s-a declanşat de mai multe ori, luminând mingea la intervale de 50 ms
|
| Date | |
| Source | Own work |
| Author | MichaelMaggs |
|
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.
|
|
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[edit]
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. | |
|
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 (talk | contribs) | {{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 (talk | contribs) | {{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 |
- You cannot overwrite this file.
File usage on Commons
The following 6 pages uses this file:
File usage on other wikis
The following other wikis use this file:
- Usage on als.wikipedia.org
- Usage on ast.wikipedia.org
- Usage on bg.wikipedia.org
- Usage on bpy.wikipedia.org
- Usage on ca.wikipedia.org
- Usage on cy.wikipedia.org
- Usage on de.wikipedia.org
- Usage on en.wikipedia.org
- Usage on en.wikiversity.org
- Usage on es.wikipedia.org
- Usage on eu.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on hr.wikipedia.org
- Usage on is.wikipedia.org
- Usage on it.wikipedia.org
- Usage on ja.wikibooks.org
- Usage on ko.wikipedia.org
- Usage on no.wikipedia.org
- Usage on pl.wikipedia.org
- Usage on pt.wikipedia.org
- Usage on ro.wikipedia.org
- Usage on sa.wikipedia.org
- Usage on sh.wikipedia.org
View more global usage of this file.
