Q. 194.0( 4 Votes )

How do you appreciate Pascal’s discovery in helping to make

hydraulic jacks.

Answer :

Hydraulic jacks-


The hydraulic jack is a device used for lifting heavy loads by the application of much smaller force. It is based on Pascal’s law. The Pascal's law states that the pressure at a point in a fluid at rest is the same in all directions.



WORKING PRINCIPLE:


The working principle of a hydraulic jack may be explained with the help of Figure Consider two piston with different surface area A1 & A2, operating in two cylinders of different diameters, which are interconnected at the bottom, through a chamber, which is filled with some liquid.



Let


W= Weight to be lifted,


F1 = Force applied on piston 1,


A1 = Area piston 1.


A2 = Area of piston2.


F2 = Force applied on piston 2 = W.


Pressure intensity produced by the force F1,



As per Pascal’s law, the above intensity p will be equally transmitted in all directions.


Therefore, The pressure intensity on Piston2




Above Equation indicates that by applying a small force F1 on the Piston1, a large force W or F2 may be developed by the Piston2.


Hydraulic jack have many uses in our life some of them are following -


● It is used in Metal press work to press sheet metal to any required shape by applying pressure on it .


● As it can produce large force from small forces ,I can be used in Drawing and pushing rods.


● It can Bend and straight any metal piece.


● Many Packing press are uses hydraulic jack.


● Lifting up heavy cars .


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