What work is needed to assemble an equilateral triangle of side length 5 cm, with a 5µC charge at each vertex?

How much work does a $12\mathrm{V}$ battery do when it moves $2.4\mathrm{C}$ from the negative terminal to the positive terminal?

A particle with charge +4.20 nC is in a uniform electric field E directed to the left. The charge is released from rest and moves to the left; after it has moved 6.00 cm, its kinetic energy is +2.20x10^-6 J. What is (a) the work done by the electric force?

A point charge q_1=+2.40 μC is held stationary at the origin. A second point charge q_2=-4.30 μC moves from the point x=0.150 m, y=0 to the point x=0.250 m, y=0.250 m. How much work is done by the electric force on q_2?

What is the speed of a proton that has been accelerated through $2300\mathrm{V}$?

How much work does a $12\mathrm{V}$ battery do when it moves $2.4\mathrm{C}$ from the negative terminal to the positive terminal?