Proszę o rozwiązanie z obIiczeniami :)

[latex]Zad.1\Dane:\W = 7200 kJ = 7200000 J\t = 1 h = 3600s \\Szukane :\P = ? \\Rozwiazanie :\P = frac{W}{t} \\P = frac{7200000}{3600} = 2000 W = 2[kW][/latex] [latex]Zad.3\Dane:\h = 5 km = 5000m\v = 360 frac{km}{h}= frac{360000m}{3600s} = 100 frac{m}{s}\g = 10 frac{N}{kg}\\Szukane :\E_p = ? \E_k = ? \\Rozwiazanie :\E_p = mgh \E_k = frac{1}{2}mv^2\\\E_p = mcdot 10 cdot 5000 = 50000 m [J] = 50m [kJ]\\E_k = frac{1}{2}mcdot 100^2 = 5000m [J] = 5m[kJ]\\ frac{E_p}{E_k} = frac{50m}{5m} = 10\\E_p jest 10-krotnie wieksza niz jego E_k [/latex] [latex]Zad.4\Dane:\m =10kg\h=10m\g = 10 frac{N}{kg}\\Szukane :\W = ? \\rozwiazanie :\W = mgh \\W = 10 cdot 10cdot 10 = 1000 J = 1[kJ] [/latex] [latex]Zad.5\Dane :\P = 2MW = 2 000 000 W\v = 36 frac{km}{h} = frac{36000m}{3600s}= 10 frac{m}{s}\\Szukane :\F_c = ? \\Rozwiazanie :\P = frac{W}{t} = frac{Fs}{t}= Fcdot v\\F = frac{P}{v}\\F = frac{2 000000}{10}=2 00 000 J = 200 [kJ] [/latex] [latex]Zad.6\Dane:\v = 54 frac{km}{h} = frac{54000m}{3600s}= 15 frac{m}{s}\F_o = 0,9 kN = 900 N\\Szukane :\P = ? \\rozwiazanie :\P = frac{W}{t}= frac{Fs}{t}=Fcdot v \\P = 900cdot 15 = 13500 W = 13,5 [kW] [/latex] [latex]Zad.7\Dane:\m=10 000 kg\s = 400m\a = 0,2 frac{m}{s^2}\\Szukane :\W = ? \\rozwiazanie :\W = Fcdot s \\a = frac{F}{m}\F = am\\F = 0,2 cdot 10 000 = 2 000 N \\W = 2 000 cdot 400 = 800000 J = 800 [kJ] [/latex] [latex]Zad.8\Dane:\E_k = 3,5cdot10^5 J = 350000 J\F = 2500 N \\Szukane :\s = ? \\Rozwiazanie :\E_k = W = Fcdot s \\s = frac{E_k}{F}\\s = frac{350000}{2500} = 140 [m][/latex]