Hi
HPhysics is a free project lib for physics equations (Laws), to calculating physics problems quickly and easily, know contain 95 equations for all scoundrel schools.
it's work in pc with python engine (python.org), and in android with (qpython3).
I made a project to facilitate the physics education, and assist the student and the teacher..
the link: her (https://sourceforge.net/projects/hphysics/files/)