8. In a vacuum, two particles have charges of q1 and q2, where q1 = +3.5 µC. They are separated by a distance of 0.26 m, and particle 1 experiences an attractive force of 3.4 N. What is q2 (magnitude and sign)?

 

Attractive force means opposite charges so the sign of q2 is negative since q1 is a positive charge.  Force is found from Coulomb’s law:

 

Solve for q2

 

So

 

 

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This page last updated on May 31, 2018