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Long, long ago, on a planet far, far away, a physics experiment was carried out. First,...

Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250-kg ball with zero net charge was dropped from rest at a height of 1.00 m. The ball landed 0.450 s later. Next, the ball was given a net charge of 7.60 μC
and dropped in the same way from the same height. This time the ball fell for 0.630 s before landing.

What is the electric potential at a height of 1.00 m above the ground on this planet, given that the electric potential at ground level is zero? (Air resistance can be ignored.

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