[tex]Dane:\\m = 4 \ kg\\h = 160 \ cm = 1,6 \ m\\t = 2 \ s\\g = 10\frac{m}{s^{2}} = 10\frac{N}{kg}\\Szukane:\\P = ?\\\\Rozwiazanie\\\\P = \frac{W}{t}\\\\ale:\\\\W = E_{p} = mgh = 4 \ kg\cdot10\frac{N}{kg}\cdot1,6 \ m =64 \ J\\\\P = \frac{64 \ J}{2 \ s}\\\\\boxed{P = 32 \ W}[/tex]
