[tex]dane:\\m = 0,6 \ t = 0,6\cdot1000 \ kg = 600 \ kg\\v = 30\frac{m}{s}\\szukane:\\E_{k} = ?\\\\Rozwiazanie\\\\E_{k} = \frac{1}{2}mv^{2}\\\\E_{k} = \frac{1}{2}\cdot600 \ kg\cdot(30\frac{m}{s})^{2}}\\\\\underline{E_{k} = 270 \ 000 \ J = 270 \ kJ}\\\\(1 \ kJ = 1000 \ J)[/tex]
