[tex]Dane:\\m = 1 \ t = 1000 \ kg\\v = 6\frac{m}{s}\\Szukane:\\E_{k} = ?\\\\Rozwiazanie\\\\E_{k} = \frac{1}{2}mv^{2}\\\\E_{k} = \frac{1}{2}\cdot1000 \ kg\cdot(6\frac{m}{s})^{2}}=500 \ kg\cdot36\frac{m^{2}}{s^{2}}\\\\\boxed{E_{k} = 18 \ 000 \ J = 18 \ kJ}\\\\(1 \ kJ = 1000 \ J)[/tex]