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(D) According to Pascal's Law,the pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the

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$6.92 	imes 10^{5} \, Pa$

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(D) According to Pascal's Law,the pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel.The force acting on the bigger piston due to the weight of the car is:$F = m 	imes g$$F = 3000 \, kg 	imes 9.8 \, m/s^{2} = 29400 \, N$The area of the bigger piston is:$A = 425 \, cm^{2} = 425 	imes 10^{-4} \, m^{2} = 0.0425 \, m^{2}$The pressure exerted on the bigger piston is:$P = \frac{F}{A}$$P = \frac{29400 \, N}{0.0425 \, m^{2}}$$P \approx 6.92 	imes 10^{5} \, Pa$Since the pressure is transmitted equally throughout the fluid,the smaller piston must bear the same pressure of $6.92 	imes 10^{5} \, Pa$.

$A$ 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 $425 \, cm^{2}$. What is the maximum pressure the smaller piston would have to bear?

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