Mechanical Properties of Fluids

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Question : 8
Total: 31
A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section of the piston carrying the load is 425 cm2. What maximum pressure would the smaller piston have to bear?
Solution:  
The maximum force, which the bigger piston can bear,
F=3000 kg ,f=3000×9.8N
∴ Maximum pressure on the bigger piston,
P=
F
A
=
3000×9.8
425×104

=6.92×105Pa
Since the liquid transmits pressure equally, therefore the maximumpressure the smaller piston can bear is 6.92×105Pa.
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