Question

1.La Campionatele Mondiale de la Tokyo (1991)Carl Lewis a stabilit recordul mondial la 100 m plat,parcugand aceasta distanta in 9,86s.Calculeaza viteza medin in m/s si in km/h.
2.Contorul kilometric al unei masini inainte de calatorie arata:
_8 7 4 2 3 iar dupa calatorie:
_8 7 5 5 5
Calatoria a durat 1h si 30 min .Calculeaza viteza medie

Answer 1

1. v=d/t=100m/9,86s=10,14m/s
10,14 m/s=10,14 x(1/1000m)/(1/3600s)=36,3km/h