Vertical Trajectory Calculation for Quadratic Drag of form -cv2Notes: This is not as practical a calculation form as the calculation for a sphere in air, but could be useful for obtaining an effective drag coefficient. If we were to model the trajectory of a 100 gram spherical rock of radius 2cm (density about 3000 kg/m3 or specific gravity 3) through air with density 1.29 kg/m3, that alternate form of the calculation would lead to a drag coefficient c = .0004 Ns2/m2. If you leave the values of c and radius at zero, they will default to the values for this rock. That will give you an example which you could then compare to the sphere calculation. |
Index Fluid friction | ||
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