# Force on a dielectric

## Homework Statement

Hello there:

In electrodynamics where there is a two paralell plane capacitor filled partially with air and partially with a dielectric $$\epsilon$$ > 1 connected to a voltage V, The question is to calculate the force on the dielectric.. ¿¿Does anybody know how to do it?? and by the way ¿Why is there any force acting on the dielectric ??

Thanks a lot