A sky diver of mass 60 kilogram can slow herself to a constant speed of 93 km/h by orienting her body horizontally, looking straight down with arms and legs extended. In this position, she presents the maximum cross-sectional area and thus maximizes the air-drag force on her.
(a) Find the magnitude of the drag force on the sky diver?
N
(b) If the drag force is equal to bv2, determine what is the value of b?
kg/m
(c) At some instant she quickly flips into a "knife" position, orienting her body vertically with her arms straight down. Suppose this reduces the value of b to 52% of the value in Parts (a) and (b). Find what is her acceleration at the instant she achieves the "knife" position?
m/s2