0,5(Еп+Ек)=3mgh
mgh+(mv^2/2)=6mgh
(mv^2/2)=6mgh -mgh
(v^2/2)=5gh
h=v^2/10g=400/100 = 4 метра
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0,5(Еп+Ек)=3mgh
mgh+(mv^2/2)=6mgh
(mv^2/2)=6mgh -mgh
(v^2/2)=5gh
h=v^2/10g=400/100 = 4 метра