Newton's Third Law

up:: 031 MOC Classical Mechanics

Newton’s third law states that, for any particles $i,j$, the forces from one to the other are opposite to each other.

That is,

$${\vec{F}}_{i\to j}=-{\vec{F}}_{j\to i}$$

where ${\vec{F}}_{i\to j}$ is the force which particle $i$ exerts upon particle $j$.

Corollaries

• The sum of all reciprocal forces in a system of particles is always zero

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References

• LEMOS, Nivaldo A. Mecânica analítica. Editora Livraria da Física, 2007.