[tex]dane:\\E_{p} = 6 \ kJ = 6 \ 000 \ J\\h = 30 \ m\\g = 10\frac{m}{s^{2}}\\szukane:\\m = ?\\\\Rozwiazanie\\\\E_{p} = mgh \ \ /:gh\\\\m = \frac{E_{p}}{g\cdot h}\\\\m = \frac{6000 \ J}{10\frac{m}{s^{2}}\cdot30 \ m}=\frac{6000 \ kg\cdot\frac{m^{2}}{s^{2}}}{300\frac{m^{2}}{s^{2}}} = 20 \ kg[/tex]
Odp. Masa ciała m = 20 kg.
