(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The 70kg student in the figure balances a 1200kg elephant on a hydraulic lift. A second 70kg student joins the first student. How high do they lift the elephant?

diameter of the piston elephant is on = 2.0m

diameter of the piston student is on = 0.48m

The liquid inside the lift is oil, therefore rho = 900 kg/m^{3}

Out would be elephant, In would be the students

2. Relevant equations

Fout/Fin = Aout/Ain

F_{out}=A_{out}/A_{in}x F_{in}- [tex]\rho[/tex]ghA_{out}

3. The attempt at a solution

I tried both equations

Fout/Fin = Aout/Ain

(rho x g x h x Aout) / (140 x 9.8) = (pi x 1^{2}) / (pi x 0.24^{2})

which ended giving me h = 0.86m which was wrong.

When i tried it with the other equation i ended up with 0.44m which was wrong as well.

I am not sure if I'm using the wrong formula though so someone please give me some guidance.

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# Homework Help: Hydraulic Lift piston

Can you offer guidance or do you also need help?

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