A train weighing 1000 tons, moving in a straight line, increased its speed from 36 to 72 km / h

A train weighing 1000 tons, moving in a straight line, increased its speed from 36 to 72 km / h. Find the change in momentum.

Data: m (mass of a given train) = 1000 t (in SI m = 1 * 10 ^ 6 kg); V1 (initial speed) = 36 km / h (in SI V0 = 10 m / s); V2 (final speed) = 72 km / h (in SI V2 = 20 m / s); the movement is straightforward.

To determine the change in the impulse of a given train, we use the formula: ΔР = Р2 – Р1 = m * V2 – m * V1 = m * (V2 – V1).

Let’s calculate: ΔР = 1 * 10 ^ 6 * (20 – 10) = 1 * 10 ^ 7 kg * m / s.

Answer: The impulse of a given train has increased by 1 * 10 ^ 7 kg * m / s.