The acceleration of a body can be determined by the formula a = v / t, where a is the acceleration, v is the speed of movement, t is the time of movement of a particular body.
Using the data from the condition of the problem, we find the acceleration of the train.
a = 15 m / s / 40 s = 0.375 m / s ^ 2.
Answer: a = 0.375 m / s ^ 2.
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