Uniform streams of fluid cross the boundary of a control volume containing a solid object. Briefly explain how Newton’s 2nd and 3rd laws allow the resultant force vector acting on the body to be derived. Figure 2 shows a steady, uniform two-dimensional jet of liquid in the atmosphere impinging on a flat plate inclined at an angle q to the jet axis. The jet cross section area is A, and its velocity is u. The liquid

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Uniform streams of fluid cross the boundary of a control volume containing a
solid object. Briefly explain how Newton’s 2nd and 3rd laws allow the
resultant force vector acting on the body to be derived. Figure 2 shows a
steady, uniform two-dimensional jet of liquid in the atmosphere impinging
on a flat plate inclined at an angle q to the jet axis. The jet cross section area
is A, and its velocity is u. The liquid density isr. It is assumed that there are no
flow losses, and that all the streamlines end up parallel to the plate. Explain
why the resultant force acts perpendicular to the plate, and show that its
magnitude is:
R . A.u cos

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