(c) Another example of an inverse square field is the electric force field F = ?

Question

(c) Another example of an inverse square field is the electric force field F = ?qQr/|r|3. Suppose that an electron with a charge of ?1.6 x 10^?19 C is located at the origin. A positive unit charge (1 C) is positioned a distance 10^?12 m from the electron and moves to a position half that distance from the electron. Use part (a) to find the work done by the electric force field. Use the value ? = 8.985 x 10^9. (Round your answer to the nearest hundred joules.) use the work from this problem to get part (a): http://www.chegg.com/homework-help/questions-and-answers/suppose-f-inverse-square-force-field-c-constant-f-r-cr-r-3-r-x-i-y-j-z-k-work-f-moving-obj-q2442135

Explanation / Answer

W= f.s = eqQr/|r|3 .(-10^6i) = 8.985 x 10^9 x1 x-1.6 x 10^-19 C x(10^-12i) .(-10^-6i)/(10^-12 )^3 = 14.36 x 10^8 J

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