H=g*t²/2 t=√ (2*H/g) =√ (2*20/10)=√4=2 c
= (V^2 = 2gh) V= √2gh = 20 м/c
на высоте 10 м. V= √2gh = √2*10*10 ≈ 14.14 м/c
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H=g*t²/2 t=√ (2*H/g) =√ (2*20/10)=√4=2 c
= (V^2 = 2gh) V= √2gh = 20 м/c
на высоте 10 м. V= √2gh = √2*10*10 ≈ 14.14 м/c