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Mechanical Engineering QUESTION #2403
Question 1
The Froude number \(Fr\) is the ratio of inertial forces to gravity forces, expressed as:
  • \(Fr = V / \sqrt{gL}\) — ratio of flow velocity to wave speed✔️
  • \(Fr = \rho V^2 / (gL)\)
  • \(Fr = V \sqrt{L/g}\)
  • \(Fr = \sqrt{gL}/V\)
Correct Answer Explanation
Froude number: \(Fr=V/\sqrt{gL}\). When \(Fr<1\): subcritical flow; \(Fr>1\): supercritical flow; \(Fr=1\): critical flow.