mesh1:AddForceAtPoint(TFormVector(Vec3(0,Force,0),null,mesh1),TFormPoint(Vec3(0,0,2),null,mesh1))
1. You can't add forces to a mesh, only a body or a model.
2. Is Force a float value or a Vec3 itself?
3. In Lua you use nil, not null.
4. AddForceAtPoint is global, so I am not sure why you are transforming the point and force to local space to begin with.