Two electrons r meters apart repel each other with a force of

a. Suppose one electron is held fixed at the point (1, 0) on the x-axis (units in meters). How much work does it take to move a second electron along the x-axis from the point (-1, 0) to the origin?

b. Suppose an electron is held fixed at each of the points (-1, 0) and (1, 0). How much work does it take to move a third electron along the x-axis from (5, 0) to (3, 0)?

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F = 23 × 10-29 1.² newtons.