Engineering Board Exam Reviewer · Fluid Mechanics · hard
A 40 mm water jet with a velocity of 25 m/s is deflected through 180° by a fixed curved vane (no friction). What is the force on the vane in the direction of the jet?
- 785.4 N
- 3141.6 N
- 1570.8 N
- 0.0 N
Answer
C. 1570.8 N
Solution
F = QV(1 - ) = AV2(1 - 180°) = 2 AV2 = 2(1000)(0.001257)(625) = 1570.8 N.
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