[tex]dane:\\k = 2\frac{N}{m}\\n = 5\\t = 10 \ s\\szukane:\\m = ?\\\\Rozwiazanie\\\\T = 2\pi \sqrt{\frac{m}{k}}} \ \ |()^{2}\\\\T^{2} = 4\pi ^{2}\cdot\frac{m}{k} \ \ |\cdot k\\\\4\pi^{2}\cdot m = k\cdot T^{2} \ \ /:4\pi^{2}\\\\m = k\cdot\frac{T^{2}}{4\pi ^{2}}\\\\ale:\\\\T = \frac{t}{n} = \frac{10 \ s}{5} = 2 \ s\\\\m = 2\frac{N}{m}\cdot\frac{(2 \ s)^{2}}{4\cdot3,14^{2}}=2 \frac{kg\cdot m}{s^{2}\cdot m}\cdot\frac{4 \ s^{2}}{39,4384}\\\\\underline{m\approx 0,2 \ kg}[/tex]