A car with a mass of 10 tons moving in a straight line; increased the speed from 108 km / h

A car with a mass of 10 tons moving in a straight line; increased the speed from 108 km / h to 180 km / h. find the change in momentum.

Given:

m = 10 tons = 10,000 kilograms – vehicle weight;

v1 = 108 kilometers per hour = 30 meters per second – initial vehicle speed;

v2 = 180 kilometers per hour = 50 meters per second – the final speed of the vehicle.

It is required to determine dP (kg * m / s) – the change in the momentum of the vehicle.

Let’s find the initial impulse of the car:

P1 = m * v1 = 10000 * 30 = 300000 kg * m / s.

Let’s find the final impulse of the car:

P2 = m * v1 = 10000 * 50 = 500000 kg * m / s.

Then the change in momentum will be equal to:

dP = P2 – P1 = 500000 – 300000 = 200000 kg * m / s.

Answer: the change in the momentum of the car is 200,000 kg * m / s.