Is there a way to make an object like a catapult so that I can stretch and throw it applying a force .Just as in case of angry bird’s catapult…Please help me… [import]uid: 82446 topic_id: 19405 reply_id: 319405[/import]
check this out in the code exchange…
http://developer.anscamobile.com/code/angry-bird-catapult-simple-pool-example
I havent actually downloaded it, but from the title it seems like it could be what your after 
[import]uid: 69826 topic_id: 19405 reply_id: 74924[/import]
Try looking at this:
http://developer.anscamobile.com/code/how-make-angry-birds-catapult
[import]uid: 23636 topic_id: 19405 reply_id: 74928[/import]