S1=V*t2/2=24*2/2=24 м S2=V*(t8-t2)=24*(8-2)=144 м
V=S/t=(24+144)/8=21 м/с
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S1=V*t2/2=24*2/2=24 м S2=V*(t8-t2)=24*(8-2)=144 м
V=S/t=(24+144)/8=21 м/с