[tex]dane:\\v = 2\frac{m}{s}\\F = 10 \ 000 \ N\\szukane:\\P = ?\\\\\\P = \frac{W}{t}\\\\ale \ \ W = F\cdot s\\\\P = \frac{F\cdot s}{t}\\\\ale \ \ v = \frac{s}{t}\\\\czyli:\\\\P = F\cdot v\\\\P = 10000 \ N \cdot2\frac{m}{s} = 10000 \ \frac{kg\cdot m}{s^{2}}\cdot2\frac{m}{s} = 20000\frac{kg\cdot m^{2}}{s^{3}}\\\\\underline{P = 20 \ 000 \ W = 20 \ kW}[/tex]
[tex](1 \ kW = 1000 \ W)[/tex]
