[tex]a)\\t = 3 \ min = 3\cdot60 \ s = 180 \ s\\v = 5\frac{m}{s}\\\\s = v\cdot t\\\\s = 5\frac{m}{s}\cdot180 \ s = 900 \ m[/tex]
[tex]b)\\v_{o} = 0\\t = 2 \ min = 120 \ s\\v = 8\frac{m}{s}\\\\s = \frac{1}{2}at^{2}}\\\\a = \frac{v}{t}\\\\s = \frac{1}{2}\cdot\frac{v}{t}\cdot t^{2}\\\\s = \frac{1}{2}vt\\\\s = \frac{1}{2}\cdot8\frac{m}{s}\cdot120 \ s\\\\s = 480 \ m[/tex]
[tex]c)\\v_1 = 30\frac{m}{s}\\t = 30 \ s\\v_2 = 60\frac{m}{s}\\\\a = \frac{\Delta v}{t} = \frac{v_2-v_1}{t}\\\\a = \frac{(60-30)\frac{m}{s}}{30 \ s}\\\\a = \frac{30\frac{m}{s}}{30 \ s}\\\\a = 1\frac{m}{s^{2}}[/tex]
