I haven't spent much time playing with it, but there are people who do, and I have often thought that it would be a good fit here:
Algodoo - http://www.algodoo.com/what-is-it/ - https://www.youtube.com/results?search_query=algodoo
I haven't spent much time playing with it, but there are people who do, and I have often thought that it would be a good fit here:
Algodoo - http://www.algodoo.com/what-is-it/ - https://www.youtube.com/results?search_query=algodoo