Respuesta :

Answer:

0.45  [m/s²].

Explanation:

1) formula of the required acceleration is (V-final velocity, V₀-initial velocity, t-elapsed time):

[tex]a=\frac{V-V_0}{t};[/tex]

2) according to the formula above:

a=(12-3)/20=0.45 [m/s²].

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