Fluid Statics - Forces on Structures

Question 1

What is newtons 3rd law?

Answer 1

For every action, there is an equal and opposite reaction

Question 2

What is a control volume?

Answer 2

A control volume is a fixed, identifiable region in space through which fluid flows.

Question 3

What will exert a distributed load on a dam?

Answer 3

Fluids and soils

Question 4

When will pressure vary linearly?

Answer 4

When the lines of the CV are straight

Question 5

What is the fluid weight of a container equal to?

Answer 5

The force exerted by the fluid on the bottom of the container

Question 6

What is the horizontal force equal to?

Answer 6

Pressure at half-depth*Surface area

Question 7

What is the centre of pressure?

Answer 7

The centre of pressure is where 𝐹ℎ needs to act to exert the
same moment as the pressure distribution

Question 8

What is the total moment summing over all strips around z*?

Answer 8

0

Question 9

How do you work out the forces for submerged angle surfaces?

Answer 9

For submerged angled surfaces, one can decompose the pressure forces into a constant and linearly distributed load