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samuel-baldwin
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Question 1
• Suppose you exerted your input force on the larger piston in Figure 19.19. How much force would you have to exert to lift a 2-unit block?
• Answer: Fifty times as much, 100 units.
Question 2
• If one unit of force lifts 50 units, isn't energy conservation being violated?
• Answer: No. The I unit of force moves the 50 units only 1/50th the distance the 1-unit moves.
Question 3
• Suppose the liquid were removed from the reservoir altogether. Would the lift still work under air pressure?
• Answer: Yes, just as air pressure in tires helps to support the weight of the car. Hydraulic liquid maintains a constant volume, so the air compressor need compress less air to lift the car.