Odpowiedź :
[tex]dane:\\m = 8 \ dag = 80 \ g = 0,08 \ kg\\v = 8\frac{m}{s}\\szukane:\\E_{k} = ?\\\\E_{k} = \frac{1}{2}mv^{2}\\\\E_{k} = \frac{1}{2}\cdot0,08 \ kg\cdot(8\frac{m}{s})^{2}\\\\E_{k} = 2,56 \ J[/tex]
[tex]dane:\\m = 8 \ dag = 80 \ g = 0,08 \ kg\\v = 8\frac{m}{s}\\szukane:\\E_{k} = ?\\\\E_{k} = \frac{1}{2}mv^{2}\\\\E_{k} = \frac{1}{2}\cdot0,08 \ kg\cdot(8\frac{m}{s})^{2}\\\\E_{k} = 2,56 \ J[/tex]