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Is it possible to observe simultaneously the energy and the momentum of a particle in free...

Is it possible to observe simultaneously the energy and the momentum of a particle in free motion?

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Answer #1

yes it is possible because energy and momentum are linked like more energy means , more momentum

example

suppose momentum = P

energy = P2 /2m  

so we can measure them with preciseness

more precisely we can see this by  Heisenberg's Uncertainty Principle

Δx* ΔP≥ h/4π

or  ΔE*Δt ≥ h/4π

canonically conjugate variables such as position x and momentum p, cant be measure  simultaneously

same way time and energy can't be measure  simultaneously

I hope you got the idea  

Goodluck for exams Comment in case any doubt, will reply for sure..

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