5.7 The rectangular roof sheet of a kennel has a dimension of 6m x 2 m. Calculate the drag force on its upper surface if the wind is blowing parallel to its length at 3m/s. The density and the kinematic viscosity of air are 1.2 kg/m³ and 1.6 x 10-3 m/s, respectively. [Ans: 0.195 N]

5.7 The rectangular roof sheet of a kennel has a dimension of 6m x 2 m. Calculate the drag force on its upper surface if the wind is blowing parallel to its length at 3m/s. The density and the kinematic viscosity of air are 1.2 kg/m³ and 1.6 x 10-3 m/s, respectively. [Ans: 0.195 N]

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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04) Define the boundary layer, then find the thickness of boundary layer, shear stress, drag force and coefficient of drag in terms of Re for the velocity profile of laminar boundary layer u/U=4(y/6)-6(y/6)³. Calculate the boundary layer thickness and drag force if the air flows over a sharp edged flat plate Im long and 0.5m wide at a velocity 0.9m/s, the air density 1.23 kg/m³ and the kinematic viscosity is 1.46*105 m/s².
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