proszę pomocy !! szypko błagam

dane: P₁ = 40 kW = 40 000 W v₁ = 12 km/h v₂ = 4 km/h szukane: P₂ = ? [latex]P = frac{W}{t} = frac{F*s}{t}\v = frac{s}{t}\\P = F*v\F = k*v\\P = k*v^{2}\\frac{P_2}{P_1}= frac{k*v^{2}_2}{k*v^{2}_1}= frac{v^{2}_2}{v^{2}_1}\\P_2 = P_1 * frac{v^{2}_2}{v^{2}_1} = 40000W*(frac{12}{4})^{2} = 40000*9 W\\P_2= 360 000 W = 36 kW[/latex]