m*(V^2-V0^2)=F*S F=m*(V^2-V0^2)/2*S=3*10^6*(15^2-10^2)/2*250=1,5*10^6 H
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m*(V^2-V0^2)=F*S F=m*(V^2-V0^2)/2*S=3*10^6*(15^2-10^2)/2*250=1,5*10^6 H