An element for sensing local shear stress is positioned in a flat plate 1 meter from the leading edge. The element simply consists of a small plate 1 cm x 1 cm, mounted flush with the wall, and the shear force is measured on the plate. The fluid flowing by the plate is air with a free-stream velocity of 30 m/s, a density of 1.2 kg/m3 , and a kinematic viscosity 1.5·10-5 m2 /s. The boundary layer is tripped at the leading edge. What is the magnitude of the force due to shear stress acting on the element?
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