After 10 s after the start of the movement, the speed of 10 m / s was developed.

After 10 s after the start of the movement, the speed of 10 m / s was developed. Find the force imparting acceleration if the mass of the train is 300t.

These tasks: t (time elapsed after the start of the movement of a given train) = 10 s; V (speed reached by the train) = 10 m / s; m (train mass) = 300 t (in SI m = 300 * 10 ^ 3 kg).

The force that imparted acceleration to a given train is determined by the formula: F = m * a = m * (V – V0) / t = m * (V – 0) / t = m * V / t.

Let’s perform the calculation: F = 300 * 10 ^ 3 * 10/10 = 300 * 10 ^ 3 H = 300 kN.

Answer: A force of 300 kN should have acted on a given train.