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Chapter: 11th Physics : Work, Energy and Power

Relation between Momentum and Kinetic Energy

Relation between Momentum and Kinetic Energy

Relation between Momentum and Kinetic Energy

Consider an object of mass m moving with a velocity . Then its linear momentum is  and its kinetic energy, KE =  ½ mv2 .


Multiplying both the numerator and denominator of equation (4.13) by mass, m


where  is the magnitude of the momentum. The magnitude of the linear momentum can be obtained by


Note that if kinetic energy and mass are given, only the magnitude of the momentum can be calculated but not the direction of momentum. It is because the kinetic energy and mass are scalars.

 


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