дано Vо=4 м\с h- ? r<<h
Е=Ео+Eвр=mVo^2\2 +mVo^2\2=mVo^2
mVo^2=mgh
h=Vo^2\g=16\10=1,6 м
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дано Vо=4 м\с h- ? r<<h
Е=Ео+Eвр=mVo^2\2 +mVo^2\2=mVo^2
mVo^2=mgh
h=Vo^2\g=16\10=1,6 м