Momentum is a vector scale, so is represented by a negative symbol if towards the left or opposite direction
A momentum of a system ( collection of items ) is the sum of the momentums of all the objects in that system
Law of conservation of momentum
when two objects collide in a closed system, the total momentum of the two objects before the collision is the same as the total momentum of the two objects after the collision.
Equation for CHANGE in momentum
Change in momentum = force x time
In an explosion, mass is scattered in all directions, meaning that the total momentum of all the matter after the explosion is 0
