Civil Engineering - UPSC Civil Service Exam Questions - Discussion

46. 

A jet of water issues from a 5 cm diameter nozzle, held vertically upwards, at a velocity of 20 m/sec. If air resistance consumers 10% of the initial energy of the jet, then it would reach a height, above the nozzle, of

[A]. 18.35 m
[B]. 19.14 m
[C]. 19.92 m
[D]. 20.00 m

Answer: Option A

Explanation:

No answer description available for this question.

Hari said: (Sep 12, 2017)  
Please provide the solution.

Vic said: (Oct 12, 2017)  
vf^2 = vi^2 - 2as
0 = (20)^2 - 2( 9.81)(s)
s= 20.3874 m.

If air resistance consumers 10% of the initial energy of the jet
s = [20.3874] - [20.3874*(10%)]
s = 18.3487 m.Ans. [A]

Gondloo said: (Apr 30, 2020)  
Thanks @Vic.

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