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Originally Posted by Jens Nordlunde
Do we have one on the forum with an analytic mathematical brain
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Really no mathematical brain but you can calculate either the kinetic energy (ekin= 0.5m*v^2) or the momentum (p=m*v).
In the first formula the weight of the blade is imho underrepresented.
It is a similar thing if one discuss about the effect of a bullet, not very easy to answer!
Roland