What Formula is Used for Part B of the Elephant and Hydraulic Lift Problem?

  • Thread starter Thread starter jason_r
  • Start date Start date
  • Tags Tags
    Hydraulic Lift
AI Thread Summary
The discussion centers on solving Part B of a hydraulic lift problem, where participants are trying to determine the correct formula to use. The equation deltaF=pg(A1+A2)d2 is mentioned, with one user reporting a calculated height of 0.35m, while another claims the correct answer is 2.3cm. There is a reminder about the area of a circle and the relationship between pressure and units. Confusion persists regarding the appropriate formula for the problem. Clarification on the correct approach is needed to resolve the discrepancies in the answers.
jason_r
Messages
26
Reaction score
0

Homework Statement



http://img186.imageshack.us/my.php?image=gdgdfgta2.jpg

the question is on the above link (PART B()

Homework Equations



deltaF=pg(A1+A2)d2

The Attempt at a Solution


deltaF=pg(A1+A2)d2
i used that formula and found that the distance was 0.35m
 
Last edited:
Physics news on Phys.org
Hehe never took the course but got 0.48 as an answer. Don't forget that the area of a circle is (pie)(r^2). Also little hint: units of pressure are 1Pa = 1N/m^2!, in this case the pressure on both sides are the same.

edit: what formula is used for part b?
 
abelanger said:
Hehe never took the course but got 0.48 as an answer. Don't forget that the area of a circle is (pie)(r^2). Also little hint: units of pressure are 1Pa = 1N/m^2!, in this case the pressure on both sides are the same.

edit: what formula is used for part b?

i have no idea ..i used deltaF=pg(A1+A2)d2
and i got 0.35m as the height but the answer is 2.3cm
 
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Trying to understand the logic behind adding vectors with an angle between them'
My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
Back
Top