Two carts collide and stick together. There will be some small amount of frictio

Question

Two carts collide and stick together. There will be some small amount of friction acting on each of the carts, but we can still expect momentum to be conserved before and after the collision because A) energy is also conserved in the interaction B) Newton's third law will take into account friction acting on both carts at the same time C) any friction will be acting on the system for a negligible amount of time, considering just before and just after the collision D) there are no net forces on each cart during the collision

Explanation / Answer

B) Newton's third law will take into account friction acting on both carts at the same time

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