Question

what change is produced in kinetic energy of the body if its mass and velocity are doubled

Answer 1

If the momentum of an object is doubled, but its mass does notincrease (so velocity remains well below the speed of light), then its velocity is doubled. If the velocity is doubled then the kinetic energy increases by the square of 2, or four time. Hence kinetic energy of the body will be 4 times to its eirlier value.

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