35.7 Relativistic Mass and Mass  Energy Equivalence
Relativistic Mass
The concept of 'Absolute Mass' of Newtonian Mechanics is no longer tenable in special Relativity;
the requirement that Law of Conservation of momentum is a fundamental Law of nature imposes the relation
then only consistency between the LorentzTransformations and
Law of Conservation of momentum can be obtained. This expression
given relativistic mass m in motion with Velocity V in a given frame
of reference; in terms of the mass m0 called rest mass of the object
when at rest in the given frame of reference.
Mass Energy Equivalence
The relativistic mass is necessary consequence of consistency between Law of Conservation of momentum and Lorentz transformations, and Lorentz transformations; likewise the consistency between conservation of energy and Lorentz Transformation imposes the relation
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