[tex]Dane:\\F = 12 \ N\\a = 3,5\frac{m}{s^{2}} = 3,5\frac{N}{kg}\\Szukane:\\m = ?\\\\Rozwiazanie\\\\Z \ II \ zsasady \ dynamik \ Newtona\\\\a = \frac{F}{m} \ \ \rightarrow \ \ m = \frac{F}{a}\\\\m = \frac{12 \ n}{3,5\frac{N}{kg}}\\\\\boxed{m \approx3,4 \ kg}[/tex]
