File:AngularVelocityRollCoast.jpg
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English: Example for constantly growing Angular Velocity
All carriages of the rollercoaster move with the same magnitude of velocity. If the vertical component is neglected we can split the velocity vector into a tangential and radial component. The tangential component can be interpreted as Angular Velocity. The picture was taken with a strong telephoto lens and a speed of 1/250 sec. The front of the first carriage is sharp. This is because here the tangential component is close to 0 and the radial movement is covered by the depth of sharpness. The velocity vector of the following carriages has a growing tangential component due to the curved movement path, the Angular Velocity is increasing. Due to this the picture of carriages and persons loose constantly sharpness. The full sharpness of the railing proofs that the picture itself is completely sharp.Deutsch: Anschauliches Beispiel für variable Winkelgeschwindigkeit.
Alle Wagen des Achterbahnzugs haben denselben Geschwindigkeitsbetrag. Vernachlässigt man die vertikale Komponente, so hat die Bewegung jedes Wagens eine radiale und eine tangentiale Komponente. Die tangentiale Komponente kann als Winkelgeschwindigkeit interpretiert werden. Die mit einem starken Teleobjektiv erstellte Aufnahme zeigt die Spitze des Zugs scharf. Grund: Die Bewegung ist auf den Betrachter zu gerichtet, der tangentiale Geschwindigkeitsanteil sehr klein, die hohe radiale Geschwindigkeit wird durch die Schärfentiefe aufgefangen. Mit zunehmendem Abstand von der Spitze haben die Wagen wegen der durchfahrenen Kurve einen immer stärker in die Richtung der Tangente zeigenden Geschwindigkeitsanteil: Die Winkelgeschwindigkeit nimmt zu. Und damit werden, trotz der kurzen Belichtungszeit von 1/250 sec, die Wagen und Insassen nach hinten zunehmend unscharf abgebildet. Das Bild an sich ist eigentlich über den vollen Bildbereich scharf, was man am Geländer erkennen kann. |
| Date | |
| Source | Own work |
| Author | Rainer H. Michael (Photo) and Rolf Süssbrich (Preparation) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 17:37, 17 May 2009 | | 632 × 340 (63 KB) | Rsuessrb (talk | contribs) | {{Information |Description={{en|1=Example for constantly growing Angular Velocity All carriages of the rollercoaster move with the same magnitude of velocity. If the vertical component is neglected we can split the velocity vector into a tangential and r |
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