Doing those gravity force calculation(g), it's all very nice, but the fact is we don't know the masses of the mobiles, so all these don't mean much and in the real world. The fact is we are calculating the acceleration.
Newtonian physic is richer then simply calculating a gForce. With very little math, we can also calculate speed and position with kinda great accuracy, by using a Galilean referential and differential/integral calculation.
We live in a classical world, on the daily basis, so I'm pretty sure that we could get more from these module then just knowing that, I'm turning and the gravity is pointing this way. I got the calculus under hand and I would be pleased to take the challenge of making a smarter library, but this is not the kind of thing that can be done alone.