Question

expression for conservation of momentum
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Answer 1

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In equation form, the conservation of momentum principle for an isolated system is written ptot = constant, or ptot = p′tot, where ptot is the total momentum (the sum of the momenta of the individual objects in the system) and p′tot is the total momentum some time later.

Answer 2

Therefore, above is the equation of law of conservation of momentum where m_{1}u_{1}+m_{2}u_{2} is the representation of total momentum of particles A and B before the collision and m_{1}v_{1}+m_{2}v_{2} is the representation of total momentum of particles A and B after the collision...