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f=3kN
p=f*v
p=3kN*15m/s
p=45kW=61,20KM
W ruchu jednostajnym:
droga/czas=prędkość, więc:
Moc=siła*prędkość
Na symbolach:
P=W/t=Fs/t
s=v/t
P=Fv
F=3kN=3000N
v=54km/h=54000m/(3600s)=15 m/s
P=3000N*15m/s=45000J/s=45000W=45kW
Odp. 45 kW