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La Campionatele Mondiale de la Tokyo (1991) Carl Lewis a stabilit record up mondiale la 100m plat parcugand aceasta distanta in 9th. Calculeaza viteza
medie in m/s si in km/ora.


Răspuns :

v=Δd/ Δt 
v=100m/ 9s -->v=11,(11m)m/s-->v= [tex] \frac{1100}{99} [/tex] m/s
In km/h-->  [tex] \frac{1100}{99} *3600--\ \textgreater \ 40 km/h[/tex]