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+#+ TITLE : README
+#+ DATE : <2017 - 04 - 17 Mon>
+#+ AUTHOR:
+#+ EMAIL : yannherklotz @yann - arch
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+#+ DESCRIPTION:
+#+ EXCLUDE_TAGS : noexport
+#+ KEYWORDS:
+#+ LANGUAGE : en
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+
+*Physics Engine
+
+    **Acceleration,
+    speed and position
+
+        I have a = dv / dt;
+v = dp / dt;
+
+I am going to use the second order runga kutta method with a = 0, b = 1,
+                                                           alpha =
+                                                               1 / 2 and beta =
+                                                                   1 / 2