Answer:
[tex]a = \frac{ {v}^{2} - {u}^{2} }{2s} \\ or \\ a = \frac{v - u}{t} \\ say \: a = - 10m. {s}^{ - 2} \\ \therefore \: deceleration = - 10m. {s}^{ - 2}[/tex]
