How much pressure is needed??

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How much pressure is needed??

How much pressure is needed to lift a certain object(5kg) from the ground using air pressure provided by an air pump?

2007-06-22 05:58:34 · 2 answers · asked by music.slayer 1 in Science & Mathematics ➔ Physics

2 answers

P=mgA

2007-06-25 16:32:28 · answer #1 · answered by Dr. R 7 · 0⤊ 0⤋

If a hydraulic lift is used to lift the object of 5 kg, the pressure required in addition to atmospheric pressure will depend on the diameter of the piston on which it is kept.

5 kg mass has a weight of 5 x 9.8 = 49 N. If r is the radius of the piston in metre, then the minimum pressure needed will be equal to
= 1 atm + 49 / pi x r^2 N/m^2.

= ( 1.01 x 10^5 + 49 / pi x r^2 ) N / m^2.

2007-06-22 13:11:55 · answer #2 · answered by Madhukar 7 · 0⤊ 0⤋