A point charge 4.20 μC is held fixed at the origin. A secondpoint charge 1.40 μC with mass of 2.80×10−4 kg is placed on the xaxis, 0.260 m from the origin.
Part A: What is the electric potential energy U of the pair ofcharges? (Take U to be zero when the charges have infiniteseparation.)
Part B: The second point charge is released from rest. What isits speed when its distance from the origin is 0.600 mm?
Part C: What is its speed when its distance from the origin is6.00 mm?
Part D: What is its speed when its distance from the origin is60.0 mm?
