Here's a breakdown:
* Momentum: Momentum is a measure of an object's mass in motion. It's calculated as mass (m) times velocity (v): p = m * v
* Total Momentum: In a system with multiple objects, the total momentum is the vector sum of each object's momentum.
* Isolated System: An isolated system means no external forces are acting on the system. This ensures that no momentum is added or lost from the system as a whole.
* Collision: A collision is an event where two or more objects interact with each other, transferring momentum.
Therefore, according to the Law of Conservation of Momentum, the initial total momentum of an isolated system before a collision is equal to the final total momentum after the collision.
In simpler terms: The total momentum of all the objects in the system stays the same before and after the collision, even though the momentum of individual objects might change during the collision.