Shouldn’t all those equations be using mass instead of weight, and velocity instead of speed?
Also, what assumptions are made regarding friction?
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What we do in life echoes in Eternity
half m vee squared.
Since vee = 2x
vee squared = 4
therefore, 4 times 
Prana,
Not exactly…
2*x^2 does not = (2x)^2
100^2 = 10000
200^2 = 40000
Therefore the impact is 4x…
Swimming is not a sport, it’s something you do to keep from drowning.
Fighting is not a sport, it’s something you do to keep from dying.