Civil Engineering - Hydraulics - Discussion

Discussion Forum : Hydraulics - Section 1 (Q.No. 21)
21.
A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the horizontal reaction at B is
10,000 kgf
15,000 kgf
20,000 kgf
18,000 kgf.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
22 comments Page 1 of 3.

Inayat Ullah Kakar said:   9 months ago
I think it's simple;

Horizontal force = wAx.
w = density × g.
Density of water = 1000 kg/cum
x = 3/2.
A = 3×4,
F = 1000× g×3×4×3/2.
F = 18000kgf.
(4)

Sony said:   3 years ago
How h=3/2? Explain me, please.

Zakir said:   4 years ago
Horizontal projected area = 3 * 4=12 m2.
Total horizontal triangular force= 0.5* 3000* 3=4500 kgf per m strip of cylinder,
Hence, the total force = 4500* 4 = 18000 kgf.
(6)

Ladla malik said:   5 years ago
Answer is 18000kgf.
(4)

Sonu said:   6 years ago
Here vertical due to water on the cylinder is cancel out. So that resultant vertical force equal to the weight of the cylinder.

Then horizontal force equal to the volume of pressure diagram i.e.

= (1/2)*3*1000*3*4.

= 18000kgf.
(4)

Abhik said:   6 years ago
How Area is 3 * 4? It's a cylinder.
(1)

Rakeah soni said:   7 years ago
Here 1kgf = 9.81N.

Ganesh said:   7 years ago
What is kgf?

Divya said:   7 years ago
Centre of gravity.

So, the depth divided by 2.
(1)

Premkumar said:   7 years ago
Then it is vertical.


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