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April 25, 2014

Homework Help: Physics

Posted by Kimbo on Saturday, November 6, 2010 at 3:48pm.

A hydraulic lift has two connected pistons with cross-sectional areas 25 cm2 and 390 cm2. It is filled with oil of density 530 kg/m3.

a) What mass must be placed on the small piston to support a car of mass 1500 kg at equal fluid levels?

kg

HELP: The pressure is constant at any height.

b) With the lift in balance with equal fluid levels, a person of mass 70 kg gets into the car. What is the equilibrium height difference in the fluid levels in the pistons?

m

c) How much did the height of the car drop when the person got in the car?

m

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