This interactive Gravity Advanced Level Physics chapter textbook works on iOS, offering a gorgeous, full-screen experience full of 15+ interactive simulations including 3D geostationary orbits simulation, animated pictures and static photos, and links to videos on Youtube. No longer limited to static pictures to illustrate the text, now students can play and conduct mathematical modelling pedagogy developed by the Author using the Open Source Physics/Easy JavaScript Simulations. They can flip through a book by simply sliding a finger along the bottom of the screen. Highlighting text, taking notes, searching for content, and finding definitions in the glossary are just as easy. And with all their books on a single device, students will have no problem carrying them wherever they go.

The content are originally based on lectures notes from Yishun Junior College, Singapore and photo from Leong Tze Kwang.

The content are licensed Creative Commons Attribution ShareALike CC-BY-SA, and the Open Source Physics/Easy JavaScript Simulations are licensed Creative Commons Attribution ShareALike Non-commercial CC-BY-SA-NC.