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h=3m
g=10m/s²
Ep= 6 J
m=?
Ep=mgh /÷gh
Ep/gh= m
m= 6 J ÷ ( 3m * 10m/s² )
m = 0,6 kg
Odp. Jabłko waży 0,6 Kg
6J= m * 10[m/s²]*3[m]
m = 6/30 kg = 0.2 kg = 20 dag