Hydrostatic pressure

  • Thread starter Bassalisk
  • Start date
  • #1
948
2

Homework Statement



In a submarine, at a specific time, her bottom part is at 30m below surface. Submarine gets a part fail. If the crew would like to get out, they would have to push the door of area 0,75 m^2. Door is at the bottom of the submarine and has weight of 300 N.
If you have a normal atmospheric pressure inside the submarine, what force would crew have to exert on the door to get out. Density of the water is 1,03 * 10^3 kg/m^3

Homework Equations



p=rho*g*h;
p=F/s;

The Attempt at a Solution



I know how to work on the problem, and i get an result. But my question here is do atmospheric pressures cancel each other out? Because u have pressure at surface pushing, and pressure in submarine pushing.

Thanks
 

Answers and Replies

  • #2
Doc Al
Mentor
45,254
1,614
But my question here is do atmospheric pressures cancel each other out? Because u have pressure at surface pushing, and pressure in submarine pushing.
Yes. Since you have atmospheric pressure on both sides, they cancel.
 
  • #3
948
2
Yes. Since you have atmospheric pressure on both sides, they cancel.

Thank you
 

Related Threads on Hydrostatic pressure

  • Last Post
Replies
1
Views
575
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
2
Views
5K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
5
Views
9K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
1
Views
2K
Replies
1
Views
1K
Replies
1
Views
4K
Top