chap 3 force & pressure
TRANSCRIPT
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FORCEFORCE
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conclusion
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conclusion
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PASCAL PASCAL PRINCIPLEPRINCIPLE
PASCAL PASCAL PRINCIPLEPRINCIPLE
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AN ENCLOSED FLUID AN EXTERNALLY APPLIED PRESSURE
IS TRANSMITTED UNIFORMLY IN ALL DIRECTION
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1
2
345
6
7
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USE TO LIFT HEAVY LOAD
HYDRAULIC JACKS
O
P
R
E
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O = HANDLE
P = IS PRESSED DOWN
E1 = VALVE A CLOSE
E2 = SMALL PISTON FORCES HYDRAULIC FLUID THROUGH VALVE B
R = PRESSURE TRANSMITTED IN A LARGE FORCE ON LOAD
O = HANDLEP = IS RAISED
E1 = VALVE B CLOSE
E2 =FLUID FLOWS FROM THE BUFFER TANK THROUGH VALVE A INTO SMALL CYLINDER
R = LIFTED UP THE LOAD
HYDRAULIC JACKS
USE TO LIFT HEAVY LOAD
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O BRAKE PEDAL
P IS PRESSED
E1
E2
THE PISTONAPPLIES APRESSURE
ON THE BRAKE FLUID
THIS PRESSURE IS TRANSMITTED TOEACH CYLINDER AT THE WHEELS
RCAUSE A PAIR OF FRICTION PADS TO PRESS
AGAINST SURFACE BRAKE DISCS
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HYDRAULIC PUMP
O
P
E
USE TO LIFT CAR/LORRYIN MOTOR
WORKSHOP
SMALL CYLINDER
IS COMPRESSED
PRESSURE IS TRANSMITTED BY OIL TO THE LARGE CYLINDER
R LIFT THE CAR
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SOLUTION
EXAMPLE
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SOLUTION
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ARCHIMEDES’ARCHIMEDES’PRINCIPLEPRINCIPLE
ARCHIMEDES’ARCHIMEDES’PRINCIPLEPRINCIPLE
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BERNOULLI’SBERNOULLI’SPRINCIPLEPRINCIPLE
BERNOULLI’SBERNOULLI’SPRINCIPLEPRINCIPLE
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