[tex]Dane:\\\Delta E_{p} = 30 \ J\\\Delta h = 5 \ m\\g = 10\frac{N}{kg}\\Szukane:\\m = ?\\\\Rozwiazanie\\\\\Delta E_{p} = m\cdot g\cdot\Delta h \ \ /:(g\cdot \Delta h})\\\\m = \frac{\Delta E_{p}}{g\cdot\Delta h}\\\\m = \frac{30 \ J}{10\frac{N}{kg}\cdot5 \ m} = \frac{30 \ N\cdot m}{50\frac{N}{kg}\cdot m}\\\\\boxed{m = 0,6 \ kg}\\\\\underline{Odp. \ A.}[/tex]
