Odpowiedź :
[tex]dane:\\m = 10 \ dag = 0,1 \ kg\\v = 20\frac{m}{s}\\szukane:\\E_{k} = ?\\\\E_{k} = \frac{1}{2}mv^{2}\\\\E_{k} = \frac{1}{2}\cdot0,1 \ kg\cdot(20\frac{m}{s})^{2}\\\\E_{k} = 20 \ J[/tex]
[tex]dane:\\m = 10 \ dag = 0,1 \ kg\\v = 20\frac{m}{s}\\szukane:\\E_{k} = ?\\\\E_{k} = \frac{1}{2}mv^{2}\\\\E_{k} = \frac{1}{2}\cdot0,1 \ kg\cdot(20\frac{m}{s})^{2}\\\\E_{k} = 20 \ J[/tex]