Physics teachers have to produce lots of diagrams so it would be good to be able to draw. Unfortunately my drawing skills lie at about the same level as my singing i.e. rock bottom. Here is my attempt to draw a person blowing into a flute. When drawing people I often opt for the Mexican approach but sometimes you just have to have a side view, then I draw my one line man. Actually it's one line plus a circle for the head, here's a one line man on a car to introduce air resistance. . Cars are also difficult to draw which is a problem since we have to draw loads of them, the one above has a flat roof for standing on but I normally draw a VW beetle.