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syed obaid Grade: 12
        

if the k.e of a particle is zero ,what is its linear momentum? If the total energy of the particle is 0 ,is its linear momentum necessarily 0?

6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

dear syed


if kinetic energy is 0 then there will be no linear velocity hence no linear momentam ...


now total energy = sum of energy possed by particle


                        =KE + PE + heat energy so on


consider if there is only potential energy & kinetic energy then


 Total energy = 0 = KE+PE


 KE = -PE   ............1


from eq 1 it can be said that if PE is equal to KE but with -ve PE then particle may have KE & hence linear momentam...


eg =>  if we throw a mass M from surface of earth to infinity then its total energy should be zero ....


TE =  PE + KE = 0


 KE = GMMe/R ............2


hence particle will have linear momentam.....

6 years ago
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