I used to rip DVDs and will happily advise you how to do this. However it is a long and labour intensive process. You have to un encrypt the DVD, download it to your computer and then reformat the huge file into a format that your tablet will recognise. You would then have to choose what format you want from, AVI, XVID,DIXV, MP4, H.264 and many more.
It can take an entire evening or overnight depending on the power of your computer to do the number crunching.
There is another way though, which cuts out all that hard work and that is to simply download a ripped version of your DVD. That way somebody has done all the hard work for you.