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m=2,5kg a że było ich 100 to masz 250kg
W= 5000J
g=10m/s
Szukane
h=?
W=F*a i F=m*g
F=250kg*10m/s
F=2500N
W=F*a /:F
W/F=a
5000J/2500N= 2m :)