[tex]dane:\\F = 500 \ N\\v = 2\frac{m}{s}\\szukane:\\P = ?\\\\P = \frac{W}{t} = \frac{F\cdot s}{t} = F\cdot v\\\\P = F\cdot v\\\\P = 500 \ N\cdot2\frac{m}{s}=500 \ kg\cdot\frac{m}{s^{2}}\cdot2\frac{m}{s}} = 1000 \ kg\cdot\frac{m^{2}}{s^{3}} = 1000 \ W = 1 \ kW[/tex]
