m1*V1=(m1+m2)*U u=m1*V1/(m1+m2)=9*10^-3*900/9=0,9 м/с dEk=m2*U^2/2=9*0,9^2/2=3,65 Дж
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m1*V1=(m1+m2)*U u=m1*V1/(m1+m2)=9*10^-3*900/9=0,9 м/с dEk=m2*U^2/2=9*0,9^2/2=3,65 Дж