Physics: How to combine components of different densities?

How do I create a heterogeneous object built out of 2 components of different densities?

I tried using the build in Ragdoll in C2 but cannot get it to work.

Ideally if it falls it should rotate because the bottom half is heavier but simply pinning the head to the body does not achieve the desired effect, both seem to fall to the left side of the screen.

http://imgur.com/a/XC9Ht

http://imgur.com/a/HOQzg

So you want it to rotate right?

Pinning with physics gives some strange effects that over rides natural physics.

Try a physic joint instead and here is my ragdoll capx if that helps. Also make sure both are set to allow rotation in the settings.

https://www.dropbox.com/s/s0p4clu9lxar5 ... .capx?dl=0