File:Impact energy dependence on distance on airsoft.pdf

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English: This image shows the dependence of the impact energy of a airsoft pellet on the distance of impact.

It was obtained by a numeric integration of the equations of motion of a spherical particle subject to quadratic air drag (Reynold number is about 23000) and gravity acceleration:

m = 0.2 g, diameter 6 mm, Drag equation was used with density of air of 1.204 kg/m^3 (at 20º C), drag coefficient of a sphere (0.47), g = 9.8 m/s^2.

The conditions of the numerical integration were:

x[0] = 0 // initial position in x (x axes) y[0] = 1.8 m // initial height (typical human) x'[0] = 120 m/s and 170 m/s y'[0] = 0

With the data obtained, the energy was plotted as a function of the distance for two typical pellets initial velocities when leaving the gun.
Date
Source Mathematica® and xmgrace.
Author Jorgecarleitao

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12 September 2012

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Date/TimeThumbnailDimensionsUserComment
current09:56, 18 September 2012Thumbnail for version as of 09:56, 18 September 20121,650 × 1,275 (3 KB)Jorgecarleitao{{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|This image shows the dependence of the impact energy of a airsoft pellet on the distance of impact. It was obtained by a numeric integration of the equations of motion of a sp...
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