[tex]Dane:\\m = 60 \ kg\\h = 2300 \ m\\g = 10\frac{m}{s^{2}}=10\frac{N}{kg}\\Szukane:\\W = ?[/tex]
[tex]W = E_{p} = mgh\\\\W = mgh\\\\W = 60 \ kg\cdot10\frac{N}{kg}\cdot2300 \ m\\\\\boxed{W = 1 \ 380 \ 000 \ J = 1 \ 380 \ kJ = 1,38 \ MJ}\\\\1 \ kJ = 1000 \ J\\1 \ MJ = 1 \ 000 \ 000 \ J[/tex]
