Question

select all that apply
the conservation of momentum ______.
□ only applies to solid collisions where the objects bounce off each other
□ requires that an object will not change velocity unless acted on by an outside force
□ means that the momentum of a group of objects cannot change unless external forces act

Explanation:

The conservation of momentum applies to all closed - system interactions, not just solid - object bounces. Newton's first law (an object will not change velocity unless acted on by an outside force) is a different concept. The conservation of momentum states that the total momentum of a closed system of objects remains constant unless external forces act on the system.

Answer:

The correct option is: means that the momentum of a group of objects cannot change unless external forces act.