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2mgh = mV² |:m
2gh = V² |:2g
h = V²:2g
h = (28m/s*28m/s):(2*10m/s²)
h = (784:20)m
h = 39,2m
g≈10 m/s
Ep=Ek
mgh=(mV²)/2
dzielimy przez m i:
gh=V²/2
dzielimy rownanie przez g :
h=V²/2g
h=28²/2*20
h=39,2 m