2A 50 kg diver steps off a 10 m high diving board and drops straight down into the water. If the diver comes to rest 5 m below the surface of the water, determine the average resistance force exerted on the diver by the water.
3#37,part 1 Work required to stop the diver W = Fdcosq W = (F)(5)(cos180)W = -5F5 m
4Set PE=0 at bottom, KE= 0 at bottom #37, part 2W = DTESet PE=0 at bottom, KE= 0 at bottomΔTE = 0 - PE at top of towerPEg = (50)(9.8)(15) = 7350 JΔTE = -7350W = -7350-5F = -7350F = 1470 N
5In a circus performance, a monkey on a sled is given an initial speed of 4 m/s up a 25º incline. The combined mass of the monkey and the sled is 20 kg, and the coefficient of kinetic friction between the sled and the incline is How far up the incline does the sled move?