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HSC Together > Year11 > Law of Conservation of Momentum (Elastic Collisions)

# Law of Conservation of Momentum (Elastic Collisions)

### What are elastic collisions?

In Prelim Physics, we analyse quantitatively and predict, using the law of conservation of momentum \Sigma m \vec{v}_{before} = \Sigma m \vec{v}_{after} and, where appropriate, conservation of kinetic energy \frac{1}{2} m v^{2}_{before} = \frac{1}{2} m v^{2}_{after} , the results of interactions in elastic collisions. An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision.

The following three videos go over the types of collisions, and the related calculations required to solve questions.