Irrlicht Engine

I use Newton because I couldn't find any better free engine (PhysX requires installing some additional stuff so I threw it away). And believe me, Havok is the best of them all if you don't look at the costs. People say "PhysX is better because..." but ask yourself, which of those cool thin...

I mean:
you have a box

1. you hit it in the exact middle - it goes wooooooooo... staight ahead
2. you hit it on the edge - it goes closer and rotates <- how to calculate how closer?

So how do I calculate how the force should change?

or... extend your SObject by adding vector<vector3df> ForceList and apply forces by adding to that list and in the callback add it's elements to the net force, then .clear() the list thanks, I didn't know how to calculate the torque deepending on the position one question: Is the force always F? I m...

How do I apply force on an object? By this I mean that I have an object and I whant it to get force as if it was hit by another object (but without having to create and simulate the object that hits). Something like Hit( float* posision_of_force, float* force, NewtonBody* target );

I have the freshest (official) Irrlicht and Newton
I have created a cube and it is simulated by Newton but it kinda falls UP and I think it should go down...

any idea how this might happen and how to fix it?