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va rog ajutari.ma ex 1,2

Va Rog Ajutarima Ex 12 class=

Răspuns :

ex.2. V=54km/h=> 54000m/3600s=15m/s
P=L/t=F*d/t= F*V=3000N*15m/s=450000N=450kW=0,45MW
1CP=736 W
CP=450000W => 450000/736= 611CP