Assuming the constant acceleration, the covered distance is given by:
where is the distance, is the acceleration and is the time.
On the other hand, by definition, the acceleration is:
where is the final velocity and stands for the intitial velocity (start from rest).
Substituting the expression for into the first equation and expressing , get:
Substituting the last equation into the expression for , obtain:
Answer. 0.125 m/s^2.
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