Buoyance - pressure on brick immersed in water

  • Thread starter Thread starter bigboss
  • Start date Start date
  • Tags Tags
    Pressure Water
AI Thread Summary
The pressure on a brick immersed in water is greatest at the bottom due to the increased depth, which results in higher pressure according to the principles of fluid mechanics. The pressure exerted on the brick is not uniform; it varies with depth, increasing as one moves deeper. Therefore, the correct answer to the homework question is that the pressure is greatest on the bottom of the brick. This understanding is crucial for solving related physics problems involving buoyancy and pressure in fluids. Overall, depth is the key factor influencing pressure on submerged objects.
bigboss
Messages
28
Reaction score
0

Homework Statement



Consider a brick that is totally immersed in water. The long edge of the brick is vertical. The pressure on the brick is

A)greatest on the sides of the brick.
B)greatest on the bottom of the brick.
C)greatest on the face with largest area.
D)greatest on the top of the brick.
E)the same on all surfaces of the brick.


Homework Equations



fb=pvg


The Attempt at a Solution



i am guessing that it would be the same on all surfaces of the brick.
 
Physics news on Phys.org


What determines the pressure at a given point under the water surface?
 


depth
 


bigboss said:
depth
Exactly! Pressure depends on the depth beneath the surface. Use that to revise your answer.
 


so it would be the bottom of the brick, because it has the most depth, thus the most pressure
 


bigboss said:
so it would be the bottom of the brick, because it has the most depth, thus the most pressure
Correct.
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top