We could determine the acceleration using this formula [tex]\boxed{a= \dfrac{v_{1}-v_{0}}{t} }[/tex]
Given from the question v₀ = 23 m/s, v₁ = 0 (the car stops), t = 5 s plug in the numbers [tex]a= \dfrac{v_{1}-v_{0}}{t}[/tex] [tex]a= \dfrac{0-23}{5} [/tex] [tex]a= \dfrac{-23}{5} [/tex] a = -4.6 The acceleration is -4.6 m/s²