Pressure in a Fluid: Same in All Directions?

[physgrl]

Homework Statement

2. The pressure in a fluid at any point is:

a. greater upward
b. greater downward
c. greater laterally
d. the same in all directions

Homework Equations

n/a

The Attempt at a Solution

I thought the pressure was greater upward because it is greater at greater depth, but the answer key says its the same in all directions. can someone explain why?

 

[LawrenceC]

Pressure is computed by multiplying the depth below the surface by the density of the fluid. At that specific depth, pressure is exerted in all directions and it is the same in all directions.

 

[physgrl]

Ohhh because the point has no area

 

[LawrenceC]

Yes!