I've seen many games and IOS apps be able to slice an object into separate parts e.g.. 'Fruit ninja'.
'Ice breaker' is another physics game that uses this concept in a novel way.'Slice Fractions' is another great example.
Here's a link to an on-line example of 'Ice Breaker': http://www.bubblebox.com/play/puzzle/1244.htm
Can Fusion's Physics engine do this? Does anyone have any ideas? It would be an amazing style of game to develop.