I need to know when a physics object instance has stopped moving and it's current screen y position.
How can we do the above in GameMaker Language script code?
PS: The screenshots add nothing to the question, and appear to be purely advertising? Please refrain from adding things like this unless they are directly related to the problem at hand...
Have you read the manual? There are a number of physics specific variables that are used for all sorts of things like this... in this case you want phy_position_x/y.