## Mechanical Engineering 361 Test Problem #2A cross-eyed woodpecker with a cork bill required 1/2 hour to peck 1/4 the way through a cypress log 53 years old. Shingles cost 79 cents per hundred and weigh 8 pounds a piece. The log being pecked upon is 34 feet long and weighs 46 pounds per foot. Assuming that the coefficient of friction between the woodpecker's bill and the cypress log is 0.097 and that there is negligible resistance to diffusion, how many units of Vitamin B will the woodpecker require in pecking out enough shingles for a $7,500 barn with detachable chicken house? The woodpecker has an efficiency of 97% and gets time and a half overtime. |