I have this function (to calculate potential for classical over-barrier model if you're wondering) where qp and qt are both (different) particle charges:(adsbygoogle = window.adsbygoogle || []).push({});

V(a,R) = -(qp /R) - [qt / (R-a)]

What is dV/da?

The maximum of the function occurs when dV/da = 0, and I need to solve for a. So does solving for a yield R[1 + sqrt(qt/qp)]^-1?

Thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Derivative particle problem

**Physics Forums | Science Articles, Homework Help, Discussion**