Coulomb?s law for the magnitude of the force F between two particles with charge

Question

Coulomb?s law for the magnitude of the force F between two particles with charges Q and Q' separated by a distance d is where K = 1/4 pi in 0, and e0 = 8.854 x 10^-12 C^2/(N . m^2) is the permittivity of tree space, Consider two point charges located on the x axis: one charge. q1 = -17.0nC, is located at x1 = -1.720m; the second charge, q2 = 38.0nC, is at the origin (x = 0.0000). Part A What is the net force exerted by these two charges on a third charge q3 = 51 .0nC placed between q1 and q2 at x3 = -1.215m? Your answer may be positive or negative, depending on the direction of the force. Express your answer numerically in newtons to three significant figures. You did not open hints for this part ANSWER: Force on q3 = N

Explanation / Answer

F=kq3(q1/r2+q2/d2)=459(17/.5052+38/1.2152)10-9N=4.2412x10-5N

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