# What is the law of conservation of momentum?

##### 1 Answer

Jul 1, 2018

#### Explanation:

**if two elastic balls collide horizontally** (no other forces affecting at that direction) **then the momentum is conserved between them
so if one ball loses speed the other ball will gain speed so the above relation is applied**

Example:

**as in this examples even though the first ball stopped, its momentum was transmitted to the other ball.**

**the above relation is direction dependant so you suppose one direction to be positive so velocities on that direction is positive while the velocities on the other direction is negative**

I hope this helps.