Two point charges are placed on the x-axis as follows: one positive charge, Q1= 3.96nC , is located to the right of the origin at x = 0.195m , and a second positive charge, Q2= 5.05nC , is located to the left of the origin at x = -0.295m .(adsbygoogle = window.adsbygoogle || []).push({});

What is the total force (magnitude and direction) exerted by these two charges on a negative point charge, Q3= -5.97nC , that is placed at the origin?

Use 8.85×10−12 for the permittivity of free space. Take positive forces to be along the positive x-axis. Do not use unit vectors.

For my answer, I put 0.000002575N on mastering physics but it said

Not quite. Check through your calculations; you may have made a rounding error or used the wrong number of significant figures.

Here is my work

F1 = (8.988 * 10^{9})[(0.000000004C)(0.000000006)/(0.195m)2] = 0.000005673N

F2=(8.988 * 10^{9})[(0.000000005C)(0.000000006)/(0.295m)2]=0.000003098N

F_{x}=F1-F2 = 0.000002575N

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# Homework Help: Point charge problem

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