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P = 120 KM = 120 * 736 W = 88 320 W (1 KM = 736 W)
s = 180 km = 180 000 m
v = 60 km/h = 60 *1000m/3600s = 50/3 m/s
szukane:
W = ?
P = W/t I*t
W = P * t
ale t = s/v = 180000m/(50/3 s) = 10 800 s
W = 88320W * 10800s = 953 856 000 J
1 kJ = 1000 J
1 MJ = 1 000 000 J
1 GJ = 1 000 000 000 J
W = 953 856 000 J = 953 856 kJ = 953,86 MJ = 0,95 GJ
1KM= 735,498 Wat=P(moc)
P=88200
s=180000m
v=60km/h=16.66m/s
W=FxS
P=W/t
t=s/v=10804s=180min.
W=Pt
W=952912800
W=praca
P=moc
t-czas(w sekundach)
F=siła
s=droga
Km/h zamieniasz na m/s poprzez podzielenie przez 3.6