Posted by Jezrell on Tuesday, July 3, 2012 at 5:38pm.
Please answer asap with complete solution thanks a lot. I need the solution to answer other questions much alike to this one. :)
Two electrons are 10^15 meters apart. One electron is fixed on its position. The other, originally at rest, is released. How fast is the free electron moving when it is 10^3 in from the fixed charge. (Solve using the Law of Conservation of Energy)

physics  bobpursley, Tuesday, July 3, 2012 at 5:55pm
Assume the fixed electron is at zero PE, zero KE.
Then the PE of the original electron is ke^2/1E15
at the new position, energy is conserved, so new PE+KE=original PE
ke^2/1E15=ke^2/1E3 + KE
find KE, then KE= 1/2 m v^2
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