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2500*10*100=2500000 J= 2,5 MJ
odp. a
h=s=100m
g=10m/s²
W=F*s
F=g*m
F=10*2500
F=25000N
s=h
W=F*s
W=25000*100
W=2500000J
W=2,5MJ ----> odp. A