The equations Bullet Physics uses for solving physics system

[Ehsanizadi]

Hi,

I'm student and I am going to evaluate whether Bullet Physics is capable of simulating physical phenomenon accurately or not.
But before that, I need to study and to know what kind of equations Bullet uses to solve physical systems.
For instance, for friction, for rigid body and soft body.
How does it consider the modulus of elasticity? and a bunch of questions like this.

I would appreciate if someone helps.

Thanks in advance.
Ehsan

[Karrok]

f = m * a


On a more serious note, you will simply have to dig through the manual, wiki and source code. Bullet uses a number of different narrowphase solvers if I'm not mistaking.
Bullet consists (among others) out of BulletCollision for the collision detection and BulletDynamics/BulletSoftBody for the solvers. Your best bet is to look into the latter 2 library parts.