Question:

mass of a car lift?

The car lift in a gas station operates with an air pressure of 2000 kPa. The piston of the car lift has a diameter of 30 cm. What is the mass of the largest car that the lift can raise??please help, thanks A) 8750 KGB) 9450 KGC) 10300 KGD) 13700 KGE) 17500 KGI am so confused, I keep getting answers that aren't a choice!! LOL

Answer:

I get 14,411 Kg as the equilibrium point (largest mass the lift could hold up), so ignoring any frictions, 13,700 Kg would be the largest choice that is liftable because you would have a net upward force to accelerate it. 17,500 could not be lifted. (0.15m * 0.15m * π) * 2,000,000 Pa / (9.81 m/s^2) = 14,410.9755 Kg

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