[pstricks] physics question

[Bryant Fujimoto]

Herbert Voss wrote:
> Hi all,
> what is the correct name for throughing a ball as seen in
> http://tug.org/PSTricks/main.cgi?file=Examples/Physics/physics
> (lower right picture. The direct translation of the german
> "schiefer Wurf" into "slate through" sounds a bit curious ...
>
> Herbert
>
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My physics textbook has a similar picture with one ball, and calls it 
the "trajectory of a projectile".

Bryant Fujimoto