After 10 seconds of the beginning of uniformly accelerated movement, the speed of the train is 0.5 m/s

After 10 seconds of the beginning of uniformly accelerated movement, the speed of the train is 0.5 m s, after what time from the beginning of movement the speed of the train will become 2 m / s.

Task data: t1 (the first time interval of movement) = 10 s; V1 (initial speed) = 0.5 m / s; V2 (required train speed) = 2 m / s; movement is uniformly accelerated and without initial speed.

Since the train under consideration was moving uniformly, the time taken to reach a speed of 2 m / s can be expressed from the equality: V1 / t1 = a = V2 / t2, whence t2 = V2 * t1 / V1.

Let’s perform the calculation: t2 = 2 * 10 / 0.5 = 40 s.

Answer: The speed of the train in question will become equal to 2 m / s after 40 s.