in acar lift compressed air exerts a force f1 on a small piston having aradius of 5cm. this pressure is transmitted to second piston of radius 15cm. if the mass of the car to be lifted is1350kg. what is f1?
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According to Pascal's law, Pressure is transmitted equally and undiminished through out the fluid.
P1=P2
F1/A1=F2/A2
F1= (A1/A2 ) F2
=[π(5 x10⁻²m)²/π(15x10⁻²m)² ](1350Nx9.8m/s2)
=1470N
=1.5 x 10³ N
The air pressure that will produce this force
P=F1/A1
=1.5x10³N/π(5x10⁻²)² m
=1.9 x 10⁵ Pa
This is almost the double of atmospheric pressure.
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