Im wondering this physic system has some issues, there an example and a .capx you can see them:
demo
.capx
Bump
If you aren't sure how to fix, it may be considered as bug, let me know.
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Looks like the physics object rotates about the centre rather than the origin point. I wonder is there a way to change it. Bit of a hack but I just made the sprite image twice the size with the top half transparent:
<img src="http://dl.dropbox.com/u/8367729/construct/example/sprite.png" border="0">
http://dl.dropbox.com/u/8367729/construct/example/physicsSine.capx
*edit*BTW the hinge breaks because you've set the revolute joint's upper and lower angle to 0.
I didn't know it can be fixed, but nice hack!
I tried to fix that like 30 times, i couldn't it anymore, i tought it was bug... but it's working you fixed that. Thanks!