[tex]dane:\\m = 2,5 \ t = 2 \ 500 \ kg\\h = 10 \ m\\t = 20 \ s\\g = 10\frac{N}{kg}\\szukane:\\P = ?\\\\P = \frac{W}{T}\\\\W = E_{p} = mgh = 2500 \ kg\cdot10\frac{N}{kg}\cdot10 \ m = 250 \ 000 \ J\\\\P = \frac{2500 \ 000 \ J}{20 \ s} = 250 \ 000 \ W = 250 \ kW[/tex]
