Physics Drop v3.0.2 Mod Apk (Unlocked) Draw as many lines or polygons as needed to gradually make the red ball fall into the U. Both the ball and the lines react to the law of gravity. Beware not to trap the ball inside a group of lines! This educational game features 18 physics problems to solve. If you get stuck, click on the restart button. Physics Drop is a fun way of practising physics… download it and try!