D. 100 kgm/s
What happens to momentum after a collision?
When two objects collide the total momentum before the collision is equal to the total momentum after the collision in the absence of external forces.
This is the law of conservation of momentum. .
The law states that when two objects collide in a closed system, the total momentum of the two objects before the collision is the same as the total momentum of the two objects after the collision.
The momentum of each object may change, but the total momentum must remain the same.
According to the question,
After a 2 car crash, one car lost 100 kgm/s worth of momentum.
Therefore , as per law of conservation of moment , after collision of 2 car total momentum must remain the same.
i.e. 100 kgm/s
Learn more about law of conservation of moment here:
https://brainly.com/question/24131537
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