The potential energy would be zero. Only kinetic energy is present in this case. To find out what the answer is we do the equation: mv^2/2 soo...
KE =mv^2/2
KE= 1(2^2)/2 which the answer will come up by 2 Joules.
I think the magnets will move towards each other due to the opposite poles being attracted to each other
For radio broadcasting, in electricity meters, in any generator.