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What is true about a system which is not affected by any external forces?
What does conservation of momentum mean?
A van with a mass of 2,000 kg is travelling at 30 m/s. It collides with a stationary car, which has a mass of 1,000 kg. After the collision, the two cars move together.
Calculate the velocity of the van and the car after the collision.
Which of the following is the unit for momentum?