Electron/proton kinetic electric energy

AI Thread Summary
An electron moving from point A to B acquires 3.53 keV of kinetic energy. When considering a proton moving from B to A, the kinetic energy gained should theoretically be the same due to conservation of energy principles. The calculations involve using the mass of the electron and proton, along with energy conversion factors. The conclusion reached is that the proton would also acquire approximately 3.53 keV of kinetic energy. This highlights the equivalence in energy gain for both particles under similar conditions.
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Homework Statement


an electron starting from rest acquires 3.53keV of kinetic energy in moving from A to B. how much kinetic energy would a proton acquire moving from B to A.


Homework Equations


1/2mv2
me=9.11e-31 kg
mp=1.67e-29 kg
1eV=1.6e-19 J

The Attempt at a Solution


conservation of energy, using potential energy = 0 at ending points and KE=3.53 at ending point so it should be equal to initial potential energy. But that's equal to q*E*s and i don't know E or s
 
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nvm, it should just be the same as the electron due to conservation of energy
so =3.63 keV
 

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