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For the sport of skydiving, terminal speed is vital
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· Figures 5.26 and 5.27 illustrate the changes resulting from air resistance. |
· Example 5.19 leads us through an example of a falling body (literally).
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Fluid resistance and terminal speed |
The direction of the fluid resistance is always opposite the direction of the body¡¯s velocity relative to the fluid. The magnitude is (at low speeds)  |
k is a proportionality constant that depends on the shape and size of the body and the properties of the fluid. |
The resistance in air (air drag or drag) is  |
The final speed (terminal speed) is  or  |
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Fluid resistance proportional to the speed |
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