[tex]Dane:\\d = 300 \ mm = 0,3 \ m \ \ \rightarrow \ \ r = 0,15 \ m\\n = 1500\\t = 1 \ min = 60 \ s\\Szukane:\\v = ?\\\\\\\underline{v = \frac{2\pi r}{T}}\\\\T = \frac{t}{n} = \frac{60 \ s}{1500} = 0,04 \ s\\\\v = \frac{2\cdot3,14\cdot0,15 \ m}{0,04 \ s}\\\\\boxed{v = 23,55\frac{m}{s}}[/tex]
