Answer:
According to the Law of Conservation of Momentum, the total momentum of a closed system remains constant before and after a collision. This means that the total momentum before a collision is equal to the total momentum after the collision.
In other words, the total momentum of all the objects involved in a collision, such as two colliding balls or two vehicles crashing, will be the same before and after the collision, assuming no external forces are acting on the system. Momentum is a vector quantity that depends on the mass and velocity of an object, and it is conserved in the absence of external forces.
This principle of conservation of momentum is a fundamental concept in physics and is widely used in analyzing and predicting the outcomes of collisions in various scientific and engineering applications, such as in physics, engineering, and transportation safety.
Thank you for asking! :D