If acceleration is constant we calculate it from the formula:
a=[tex] \frac{v}{t} [/tex]
v=36[tex] \frac{km}{h} [/tex]
t=5s
We convert units:
t=5s=[tex] \frac{1}{12} [/tex]h
a=[tex] \frac{36}{ \frac{1}{12}} [/tex]=432[tex] \frac{km}{h²} [/tex]=0,033333333333333[tex] \frac{m}{ s^{2} } [/tex]