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W=2000000g*9m*2m/s2
W=36000000J
36MJ
m=2 t=2000000g
r=9m
a=2m/s²
Szukane:
W=?
W=F×r
F=m×a
F=2000000×2m/s²
F=4000000m/s²
W=4000m/s²×9m=36000000 J