# Fluid pressure problem? please help

1. Jan 6, 2008

### arpitm08

Fluid pressure problem? please help!!!

1. The problem statement, all variables and given/known data
The input cylinder of a hydraulic lift has a diameter of 8.00 cm, and a bronze lion sits on a cylinder with 198.0 cm diameter. If the lion has a mass of 1395 kg, how far down does the input cylinder have to go to lift the lion 0.500 meter?

2. Relevant equations

p1 + 0.5 p (v1)^2 + pg(h1) = p2 + 0.5 p (v2)^2 + pg(h2)
F1/A1 = F2/A2

3. The attempt at a solution

This is fluids at rest, so the velocity doesn't come into hand. It doesn't provide p. h1 is 0.5m. What do p1 and p2 equal. They also don't give the force applied on the input cylinder. I don't know how to do this. I don't want the answer. I just want to know how to get there. I'd rather understand the concept behind it.

2. Jan 7, 2008

### Shooting Star

Fluids are taken to be incompressible.

3. Jan 13, 2008

### arpitm08

thanks that makes it much easier
i overlooked that

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