72km/h=72000m:3600s=20m/s
v=s/t-prędkość
t=s/v
t=2000m:20m/s
t=100s
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72km/h=72000m:3600s=20m/s
v=s/t-prędkość
t=s/v
t=2000m:20m/s
t=100s