The third law states that momentum is always conserved. If one object imparts a momentum p<sub>0</sub> on another, the first object's momentum will change by -p<sub>0</sub>. This can be viewed as a consequence of [[Noether's Theorem]]; the associated [[symmetry]] is that the laws of physics do not change under spatial translations (that is, the laws of physics are the same everywhere). | The third law states that momentum is always conserved. If one object imparts a momentum p<sub>0</sub> on another, the first object's momentum will change by -p<sub>0</sub>. This can be viewed as a consequence of [[Noether's Theorem]]; the associated [[symmetry]] is that the laws of physics do not change under spatial translations (that is, the laws of physics are the same everywhere). |