Odpowiedzi

2009-10-26T18:50:27+01:00
S1=100m
V1=5m/s
t1=s1/V1=100m/5m/s=20s

t2=80s
V2=1m/s
s2=V2*t2=80s*1m/s=80m

Vśr.=(100m+80m)/(20s+80s)=180m/100s=1,8m/s
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