Class 9 Physics Force and Laws of Motion Momentum Conservation

Momentum Conservation

 Law of conservation of momentum: In absence of an external unbalanced force the sum of momenta (plural of momentum) of two objects before collision is equal to sum of momenta of those objects after collision.


  • All conservation laws such as conservation of momentum, energy, angular momentum, charge etc. are considered to be fundamental laws in physics. These are based on observations and experiments and cannot be proved. They can be verified, or disproved, by experiments.



Where  ua = initial velocity of mass A       ub = initial velocity of mass B

             va = final velocity of mass A         va = initial velocity of mass B

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