Q1 of 46 Page 457

The magnitude of linear momentum of a particle moving at a relativistic speed v is proportional to

The magnitude of linear momentum is given by,


P=mv


The relativistic mass of the particle is,



Thus, magnitude of linear momentum is,



This value of the linear momentum does no match with any option.


Thus, correct option is D

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(B) If the rod stays at rest but the observer starts moving parallel to the measured length of the rod, the length will be reduced.