Lời giải:

36 km/h = 10 m/s; 45 km/h = 12,5 m/s.

a) \(12,5 = 10 + a.5 \Rightarrow a = 0,5\,\,(m/{s^2})\)

\[v = {v_0} + at = 10 + 0,5.60 = 40\,\,(m/s)\]

b) \[{s_{10}} = 10.10 + \frac{1}{2}{.0,5.10^2} = 125\,\,(m)\]

\[{s_9} = 10.9 + \frac{1}{2}{.0,5.9^2} = 110,25\,\,(m)\]

\[\Delta s = {s_{10}} - {s_9} = 125 - 110,25 = 14,75\,\,(m)\]