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a fost răspuns

LA CAMPIONATELE MONDIALE DA LA tOKYO cARL lEWIS A STABILIT RECORDUL MONDIAL LA 100M PLAT PAECURGAND ACESTA DISTANTA IN 9,86S. cALCULEAZA VITEZA MEDIE IN M/S SI KM/S

Răspuns :

Veronikasirbu1
d/2=v1t1
d/2=v2/t2
d=vm(t1+t2)

t1=d/2v1
t2=d/2v2

d= vm( d/2v1+d/2v2)  :d
1=vm(1/2v1+1/2v2)

1=vm (v1+v2)/2v1v2

vm=2v1v2/v1+v2=2*25*54/79=34,1 m/s

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