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Two point charges q1 and q2 are held 4.00 cmapart. An electron released at a point...

Two point charges q1 and q2 are held 4.00 cmapart. An electron released at a point that is equidistant from both charges (see the figure (Figure 1)) undergoes an initial acceleration of 8.00×1018 m/s2 directly upward in the figure, parallel to the line connecting q1 and q2. Find the magnitude and sign of q1 and q2.

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Answer #1

Let the charges have same magnitude, since electron is accelerating upward, q1 must be positive and q2 must be negative.

The net force on electron is

Therefore,

and  

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