"What it means to say that momentum is conserved is that momentum is the same before and after the collison." Or this is more correct: "In an isolated system (i.e. provided no external force acts), the total momentum of the system remains constant."
MV before collision is equal to MV after the collision. The product of the mass and velocity of the objects before they collide is equal to the product of the mass and velocity of the objects after they collide. In an elastic collision this is easy to measure, in an inelastic collision some energy is lost to heat, sound, etc.
What does it mean to say momentum is conserved?
momentum is conserved means that the force used to create the momentum is never lost in the first place... it is simply transferred from one object to another (through contact), and this momentum is thus "conserved"
When momentum is conserved, the initial momentum is equal to the final momentum.
Momentum would be conserved.
Momentum is always conserved. No matter what the collision, as long as you look at everything involved, momentum will always be conserved.
Well, momentum is always conserved in a closed system.
Linear momentum is conserved until an external force is applied.
To the best of current scientific knowledge, momentum IS always conserved.
For momentum to be conserved in a system it must
Momentum is conserved.
You say that momentum is conserved. This is always the case, if the system has no interaction with anything outside the system.
The situation is not quite clear. Total momentum is always conserved, but momentum can be transferred from one object to another.