2 ms·Not perfectly vertical, and you still have friction of the wheels on the track.by philjohn 8y agoNot perfectly vertical, and you still have friction of the wheels on the track.nielsole 8y agonote that also phones have air friction, so it might not be discerniblePiskvorrr 8y agoYup. My phones tend to drop along ballistic trajectories, which is rarely a straight line towards the Earth-Moon barycenter ;)