[tex]dane:\\m = 1000 \ kg\\v = 36\frac{km}{h} = 36\cdot\frac{1000 \ m}{3600 \ s} = 10\frac{m}{s}\\szukane:\\E_{k}=?[/tex]
[tex]E_{k} = \frac{1}{2}mv^{2}\\\\E_{k} = \frac{1}{2}\cdot1000 \ kg\cdot(10\frac{m}{s})^{2}} = 50 \ 000 \ J = 50 \ kJ\\\\(1 \ kJ = 1000 \ J)[/tex]
