[tex]dabe:\\P = 0,3 \ kN = 300 \ N\\h = s = 10 \ m\\a = 0,5\frac{m}{s^{2}} = 0,5\frac{N}{kg}\\g = 10\frac{N}{kg}\\szukane:\\W = ?\\\\Rozwiazanie\\\\W = F\cdot h\\\\F = m\cdot a\\\\ale:\\P = m\cdot g \ \ /:g\\\\m = \frac{P}{g} = \frac{300 \ N}{10\frac{N}{kg}} = 30 \ kg\\\\\\W = F\cdot s\\\\W = m\cdot a\cdot s\\\\W = 30 \ kg\cdot0,5\frac{N}{kg}\cdot 10 \ m\\\\W = 150 \ J[/tex]
