V=800m/s
Ek=3,2kJ=3200J
Ek=½*(m*v²)|*2
m*v²=2Ek|:v²
m=2Ek/v²
m=2*3200J/(800m/s)²
m=6400J/640000m²/s²
m=0,01kg
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V=800m/s
Ek=3,2kJ=3200J
Ek=½*(m*v²)|*2
m*v²=2Ek|:v²
m=2Ek/v²
m=2*3200J/(800m/s)²
m=6400J/640000m²/s²
m=0,01kg