Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250- ball with zero net charge was dropped from rest at a height of 1.00 . The ball landed 0.400 later. Next, the ball was given a net charge of 7.75 and dropped in the same way from the same height. This time the ball fell for 0.640 before landing.What is the electric potential at a height of 1.00 above the ground on this planet, given that the electric potential at ground level is zero? (Air resistance can be ignored.)