[tex]dane:\\m = 0,5 \ kg\\F = 2 \ N\\t = 5 \ s\\szukane:\\\Delta v = ?\\\\a = \frac{F}{m}\\oraz\\a = \frac{\Delta v}{t}\\\\\frac{\Delta v}{t} = \frac{F}{m}\\\\\Delta v\cdot m=F\cdot t \ \ /:m\\\\\Delta v = \frac{F\cdot t}{m}\\\\\Delta v = \frac{2 \ N\cdot 5 \ s}{0,5 \ kg} = \frac{2 \ kg\cdot\frac{m}{s^{2}}\cdot5 \ s}{0,5 \ kg}\\\\\Delta v = 20\frac{m}{s}[/tex]
