Marissa Buser Name: Name: 3650:291-002 Elementary Classical Physics I Spring 2022 Group Homework 9, due Friday, April 15, at the beginning of class Buildings in our region are designed for basic wind speeds of 90 mph (40 m/s). You are designing a garage with a flat roof of area 50 m and need to know the force on the roof due to the wind. For your calculations you assume that a steady wind of speed 40 m/s is blowing above the roof while the air inside the garage is still. The density of air is about ~ kg/m3. a) Draw a sketch and collect the available information. Please name all variables. PI 50mz TH. -42 Sair - # kg/m3 P2 V = 40 m/S b) As a result of the wind, the pressure above the roof is larger than inside the garage [ ] smaller than inside the garage c) Which law/principle will help you do the calculation? [ ] Pascal's principle [ ] Archimedes' principle X Bernoulli's principle [ ] equation of continuity d) Find the net force on the roof, magnitude and direction. P 2 - P, = 2 Pair ( V z- Vz) P 2 - P, = 2 ( # kg/m3 ) ( 40 m/s ) 2 = 1000 / m Fnet = ( P 2 - P, JA = 1000 N/mz A = Im2 and A = 50 m2 . Fret = ( 50 m 2 ) ( 1000 N /m2) = 50, DO0 N