You should also have the equation F=qE...you can rearrange this to find the electric field, because you know the size of the force that had to act on the charged particle. This field magnitude can then be used to find the potential difference :)
Hi ya,
The equation you have used is correct - remember, that if the car has caught up with the bus, then d will be the same for both. Hope this helps :)
I'm currently doing a third year project (undergraduate) on supersymmetry, and am slightly confused as to just how the Higgs naturalness problem is solved through adding superparticles to the standard model. I've been advised to include discussion of radiative corrections, which, at most, all i...