Question

During a weak jump, the value of Froude lies in between________

(a) 1 to 2.5

(b) 2.5 to 3.5

(c) Less than 1

(d) Zero

I have been asked this question in an interview for internship.

Query is from Force Exerted by a Jet on a Stationary Flat Inclined Plate topic in portion Impact of Jets and Jet Propulsion of Fluid Mechanics

Answer 1

Correct choice is (a) 1 to 2.5

The best explanation: Weak jump is a jump that takes place, when the Froude’s number lies in between 1 to 2.5. The surfaces that result due to weak jump have a very little energy dissipated. Thus, option 1 to 2.5 is the correct one.