### How much work is done to move charge

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Q. Two bicycle tires are set rolling with the similar initial speed of 3.20 m/s along a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 {rm psi} and goes a distance of 18.9 m; the other is at 105 {rm psi} and goes a distance of 92.6 m. Suppose that the net horizontal force is as a result of rolling friction only and take the free-fall acceleration to be g = 9.80 m/s^2.

Q. How much work is done to move 2.0 micro coulomb of charge from the negative terminal to the positive terminal of a 2.50 V battery?

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