Sitting on the deck one evening. watching for that pesky bunny, jon and his brother see a twig floating down from an aspen tree. (wait - os that a bunny ?) they wonder just what the boundary layer looks like on the twig.
A) Considering that the flow is noraml to the cylindrical - like twig, sketch this boundary layer on the twig. Explain the key physical concepts to the puups.
B) how does the nature of the boundary layer affect lift and frag on the twig?
C) what types of drag are acting on the twig?
D) how would a sudden thunderstorm ( strong wind, rain, hall)) affect the drag ?