Hydrostatic force on submerged curved surface

[febbie22]

Homework Statement

Hi i know how to do these problems but its calculating the weight of the fluid, which you have to do to minus it from the vertical force.

But in the solutions to the problem is say that the volume is R^2 - Pie *(R^2)/4 *1

The only thing i want to know is why is that the volume because I've never seen anything like it and if it is correct is it in all the problems so i can just remeber it.


Cheers

 

[tiny-tim]

Hi febbie22!

(have a pi: π and try using the X² tag just above the Reply box )

Can you give us more detail about this problem?

(and there's no way that R² - πR²/4 can be a volume … it's obviously an area )

 

[febbie22]

Hi its question 11-19, i triedto put it on word but it didnt let me upload. And I've got the solutions to the problem. and so when it says to calculate the weight it says

rowg * (R^2 - Pie * (R^2)/4 * 1

 

[tiny-tim]

Hi its question 11-19, i triedto put it on word but it didnt let me upload. And I've got the solutions to the problem. and so when it says to calculate the weight it says

rowg * (R^2 - Pie * (R^2)/4 * 1

(please use the X² tag just above the Reply box )

I can't find that formula … which page is it on?

(and it's spelt rho, and you must have missed out an h … that's still an area!)

 

[febbie22]

oh sorry it example 11-2 on page 494

and its the weight of fluid block per m length

that i don't get

 

[tiny-tim]

oh sorry it example 11-2 on page 494

and its the weight of fluid block per m length

that i don't get

I can't see a page 494 …

have you posted the correct document?