Actividi Of Organization

Pascal’s ´principle

11. One of the most common applications of Pascal’s principle, the hydraulic elevator relates applied force to the area of two pistons connected between them. In a hydraulic elevator showed on drawing the area of piston 2 is 3 times bigger than the area of piston 1. Justify the answers to each one of the following questions.

A) If piston 1 is applied 100 Pa of pressure. What pressure will be applied on piston 2?

b) If the relation between areas is 1:3. Which relation will be between the forces?

Archimedes’ principle

Archimedes’ principle is related to the force that a liquid pushes any object sunk in it, having the volume of the displaced liquid and density of liquid and gravity. So, if E is the buoyant force:

E= Pliquid gVdisplaced

12. We sink an object of 1m in a liquid. What volume of liquid is evacuated of displace? Justify your answer.

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13. if the density of a liquid changes from 600 kg/m^3 to 900 kg/m^3, what would happen with the buoyant force, what gets a sunk object in it? Justify your answer.

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14. Three objects having the same volume are sunk in the same liquid, but each one of them is sunk in a different depth. What can you conclude about the objects densities? Which one is the most or the least dense?

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15. Check again the exploratory activity that you answer about a hypothetic situation where a person swims in a pool on the moon. Using what you have learned, answer it again and compare it with the previous one.

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16. The liquid and any other submerge object densities determine if an object floats or sinks. Sea water density is 1030 kg/m^3 and steel density is 7850 kg/m^3, how can the buoyant force increase in order a 10,000 tons steel ship floats on the sea?

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