Ecałkowita=Ek+Ep Ecałk.=W(praca)
E=(mV^2)/2+mgh
W-mgh=(mV^2)/2
(W-mgh)*2=mV^2
V^2=[(W-mgh)*2]/m
V^2=((300-100)*2)/5
V^2=80
V=ok.8,9m/s
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Ecałkowita=Ek+Ep Ecałk.=W(praca)
E=(mV^2)/2+mgh
W-mgh=(mV^2)/2
(W-mgh)*2=mV^2
V^2=[(W-mgh)*2]/m
V^2=((300-100)*2)/5
V^2=80
V=ok.8,9m/s