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Pascal And Bernoulli Principles

Published on Nov 27, 2015

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1.

Pascal's Principle
When a force is applied to a confined fluid, the change in pressure transmits equally to all parts of the fluid.

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2.

A liquid that fills a bottle exerts pressure in all directions. Squeezing the bottle increases the pressure. What happens if you remove the cover?

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3.

Why do we care?

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4.

Because of Pascal's Principle, we have hydraulic systems.

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5.

A hydraulic system uses liquids to transmit pressure in a confined fluid. It multiplies force by applying the force to a smaller surface. The pressure transmits to a larger area, therefore, transmitting a stronger force.

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6.

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7.

Fluids flow from area of high pressure to an area of low pressure.

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8.

Daniel Bernoulli discovered in the 1700's that the pressure of a moving fluid is different then the pressure of a fluid at rest.

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9.

Bernoulli's principle states that the faster a fluid moves, the less pressure it exerts. As speed increases, the pressure decreases.

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10.

Why do we care?

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11.

Because of Bernoulli's Principle, we have airplanes that fly, and chimneys that keep smoke out of houses.

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12.

Because of the shape of airplane wings, air moves faster above the wing, creating an area of low pressure. Area of high pressure under the wing causes lift.

13.

Wind blows across the top of the chimney causing area of low pressure. Air along with smoke moves upward.

14.

What are some other examples?

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Marybeth Mineo