3 4 Who is pascal Blaise Pascal June

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Who is pascal Blaise Pascal , (June 19, 1623, – August 19, 1662, ) was a French mathematician, physicist, and philosopher. Pascal's earliest work was in the natural and applied sciences where he made important contributions to the construction of mechanical calculators, the study of fluids, and clarified the concepts of pressure.

Experiment to verify the Pascal’s Principle When the piston is pushed into the glass sphere the jet of water is shot out from the holes in the glass sphere with the same speed. This is because the pressure acting on the water is transferred uniformly

RELATIONSHIP P = F/A From pascal’s principle , F 1 = F 2 A 1 A 2 P 1 = P 2

USING PASCAL’S PRINCIPLE

Applications of Pascal’s Principle (1)Automobile hydraulic lift

hydraulic lift Input force Output Force

THINK!!!!!! The figure shows a basic hydraulic lift that has a small and a large pistons with cross-sectional area of 0. 5 m 2 and 2 m 2 respectively. A man with the weight of 700 N is standing on the small piston. Determine (a) The pressure transmitted in the hydraulic fluid. (b) The mass of the car (c If the small piston is pushed down at a depth a 0. 5 m, what is the distance moved by the large piston. 0. 5 m 2 2 m 2

40 kg 2000 kg 20 m 2 What is the area of a piston where an elephant is standing on. ?

(2) Hydraulic Brake

2. HYDRAULIC BRAKE

THINK !!!!!!! Tennis ball RETINA OPTIC NERVE Blindness occur - - as a result of tennis ball hit your eyes

Tennis ball RETINA OPTIC NERVE The pressure on the relatively tough cornea may cause only momentary pain and no apparent damage But by Pascal’s principle, the pressure is transmited undiminished through the fluid of the eye to the delicate retina, possibly causing a tear and hemorrhagin and blindness

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