Disable physics between certain meshes?


How would I get about disabling physics between certain meshes. For instance, If I have a static sphere parented to a cube with rigid body physics, when the sphere intersects the cube, the cube freaks out and flies all over the place. Here is a pic to explain the situation a little better

. So how can I disable physics between the sphere and cube but enable physics between the sphere and other objects? I hope I explained my situation clearly.


sensor object, or 6dof joints or collision layers/masks

Thank you!