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W=60kg×10N/kg×15m=9000J=9kJ <-praca
P=9000J÷20s=450W <-moc
Odp. Wykonano pracę 9kJ a moc wynosiła 450W.
m=60 kg
h=15 m
t=20 sek.
g= 10 m/s²
Szukane:
W=?
P=?
W= m × g × h = 60 kg × 10m/s² × 15 m = 600 × 15 = 9000 J
P= ⅕W ÷ t = 9000J ÷ 20 sek. = 450 W
m=60 kg
h=15 m
t=20 sek.
g= 10 m/s²
W= m × g × h = 60 kg × 10m/s² × 15 m = 600 × 15 = 9000 J
P= ⅕W ÷ t = 9000J ÷ 20 sek. = 450 W