Question

a large truck collides with the back of a stopped car on an icy road. how does the momentum of the whole system change after they collide, assuming it is a closed system (there is no outside net force acting on them)? also, assume there is zero friction. (1 point) the momentum is opposite what it was before the collision. the momentum stays the same. the momentum decreases. the momentum increases.

Explanation:

According to the law of conservation of momentum, in a closed system (no external net force), the total momentum of the system remains constant. Here, the truck - car system is a closed system (no outside net force as assumed, zero friction). So, the momentum of the whole system does not change.

Answer:

The momentum stays the same.