Section 3: Pascal’s Principle What does Pascal’s principle say about change in fluid pressure? How does a hydraulic system work?

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Presentation transcript:

Section 3: Pascal’s Principle What does Pascal’s principle say about change in fluid pressure? How does a hydraulic system work?

Transmitting Pressure in a Fluid When force is applied to a confined fluid, the change in pressure is transmitted equally to all parts of the fluid.

Pascal’s Principle Definition: The rule that when force is applied to a confined fluid, the change in pressure is transmitted equally to all parts of the fluid. A pascal is a unit of pressure equal to 1 newton per square meter.

Hydraulic Devices In a hydraulic device, a force applied to one piston increases the fluid pressure equally throughout the fluid.

Hydraulic Devices By changing the size of the pistons, the force can be multiplied.

Hydraulic Brakes The hydraulic brake system of a car multiplies the force exerted on the brake pedal.

Go back and answer the two key questions

Section 4: Bernoulli’s Principle How is fluid pressure related to the motion of a fluid? What are some applications of Bernoulli’s principle?

Bernoulli’s Principle Definition: Bernoulli’s principle states that as the speed of a moving fluid increases, the pressure exerted by the fluid decreases.

Applying Bernoulli’s Principle Bernoulli’s principle helps explain how planes fly.

Applying Bernoulli’s Principle An atomizer is an application of Bernoulli’s principle.

Applying Bernoulli’s Principle Thanks in part to Bernoulli's principle, you can enjoy an evening by a warm fireplace without the room filling up with smoke.

Applying Bernoulli’s Principle Like an airplane wing, a flying disk uses a curved upper surface to create lift.

Go back and answer the two key questions

Ted-Ed Link Video is not working…respond to THINK question online