Pascal's Principle Problem


by Collegestudent5
Tags: pascal, principle
Collegestudent5
Collegestudent5 is offline
#1
Nov13-07, 11:09 PM
P: 4
A piston of cross-sectional area "a" is used in a hydraulic press to exert a small force of magnitude "f" on the enclosed liquid. A connecting pipe leads to a larger piston of cross-sectional area A. (a) what force magnitude F will the larger piston sustain without moving? (b) If the piston diameters are 3.80 cm and 53.0 cm, what force magnitude on the small piston will balance a 20.0 kN force on the large piston?

A picture of the figure can be found at
http://panda.unm.edu/Courses/Price/Phys160/F33-3.jpeg

I used the formula f/a = F/A for (a). the answer I found was F = f x 195. Am i supposed to leave f in my answer. If no, how do i solve for f.

I used the same formula for (b) and got 102.

Please help me double check my answers.
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Shooting Star
Shooting Star is offline
#2
Nov14-07, 05:15 AM
HW Helper
P: 1,986
Seems to be correct. In the first Q, you just have to write fA/a, I think, because the values are given only in (b).
Collegestudent5
Collegestudent5 is offline
#3
Nov14-07, 07:19 AM
P: 4
Thanks for the help.


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