A liquid jet of density r and area A strikes a block and splits into two jets,

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A liquid jet of density r and area A strikes a block and splits into two jets, as shown in the figure. All three jets have the same velocity V. The upper jet exits at angle θ and area αA, the lower jet turns down at 90° and area (1 − α)A. (a) Derive a formula for the forces (Fx, Fy) required to support the block against momentum changes. (b) Show that Fy = 0 only if α ≥ 0.5. (c) Find the values of α and θ for which both Fx and Fy are zero.

V. A (1- )A
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Shigleys Mechanical Engineering Design

ISBN: 978-1121345317

9th edition

Authors: Richard G. Budynas, J. Keith Nisbett

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