In this post, I'll be explaining more about momentum, and also about impulse and collisions. In the picture above, we can see why the car from last week was suddenly braking. It appears as though it and a brown car have had a collision. A collision is when two moving bodies exert forces upon each other for a relatively short amount of time. So when the two cars' momentum carries them towards each other, they eventually collide. Along with that, comes impulses. An impulse is anything that changes the momentum of an object, which in this picture is the other car.
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