calculating work

[mark]

I cant figure out how to set up the problem

an atom is moving radially outward from the origin opposite the pull of the force

f = a/ (r-b)^3 - c/r^6

where a, b, and c are constants and r is the radal distance from the origin. how much work must be done to move the atom from R1 to R2

 

[royhaas]

Integrate.

 

[daon]

\(\displaystyle \L\\ W = \int_{r1}^{r2}F \bullet dr\)