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m-2kg
g-10m/s ^2 przyspieszenie ziemskie
h-1,5m
Ep=mgh
Ep=2kg*10m/s^2 *1,5m=30J
g= 1,62 m/s² - przyspieszenie na Księżycu
E= 2kgX 1,5 m x 1,62 m/s²
E= 4,86 [ kg x m²/s²]= [N x m]=J