When approaching the station, the train, having an initial speed of 9, stopped after 50 s.

When approaching the station, the train, having an initial speed of 9, stopped after 50 s. Determine the projection of acceleration after braking.

The speed of the train can be expressed by the formula:
V = V0 + a * t, where V is the final speed of the train (V = 0 m / s), V0 is the initial speed of the train (V0 = 9 m / s), and is the acceleration of the train (m / s²), t is the time train movement (t = 50 s).
Let us express and calculate the acceleration of the train when braking:
V = V0 + a * t.
0 = 9 + a * 50.
-9 = a * 50.
a = -9 / 50 = -0.18 m / s².
Answer: The acceleration of the train when braking is -0.4 m / s².