Please help me with this question!!! I understand the concepts of potential difference and charge etc but i dont understand what to do with the velocity. 1) In a lightning flash, the potential difference between the cloud and the ground is 1.0 x 10exp9 V and the quantity of charge transferred is 30 C. What is the change in potential energy of the transferred charge? if all of that energy could be used to accelerate a 1000 kg car from rest, what would be the car's final speed? Thank you so much for your help!!!