Here's a more detailed explanation:
* Momentum: Momentum is a measure of an object's mass in motion. It's calculated by multiplying an object's mass by its velocity.
* Conservation: The word "conservation" means that something stays the same.
* Combined Momentum: The total momentum of a system is the sum of the momenta of all the objects within that system.
In simpler terms: When objects bump into each other, the total amount of "motion" in the system before the collision is the same as the total amount of "motion" after the collision. This doesn't mean the individual objects keep the same momentum, but the overall momentum of the whole system stays the same.
Important Note: This law only applies in the absence of external forces. If there are outside forces acting on the system (like friction), the total momentum might change.
