h=g*t^2/2 L=V0*t h=L по условию. g*t^2/2=V0*t t=2*V0/g=2820/10=4 c h=10*4^2/2=80 м
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h=g*t^2/2 L=V0*t h=L по условию. g*t^2/2=V0*t t=2*V0/g=2820/10=4 c h=10*4^2/2=80 м