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## Homework Statement

An electron (charge -e, mass m) and a positron (charge +e, mass m) revolve around their common center of mass under the influence of their attractive coulomb force. Find the speed of each particle v in terms of e, m, k and their separation r ?

## Homework Equations

F= kq1q2/ r^2

## The Attempt at a Solution

Can you guys give me a hint on this one ? Should I find the angular speed then ?