m*V0^2/2=Ep+Ep/3=4*Ep/3
m*V0^2/2=4*m*g*h/3 V0=Sqrt(8*g*h/3)=sqrt(8*10*15/3)20 м/с
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m*V0^2/2=Ep+Ep/3=4*Ep/3
m*V0^2/2=4*m*g*h/3 V0=Sqrt(8*g*h/3)=sqrt(8*10*15/3)20 м/с