1 / 17

220 likes | 805 Vues

Forces in Fluids. Chapter 13. What is pressure?. The result of a force acting over a given area. Pressure = Force/Area What label? N/m 2 1 N/m 2 is known as a pascal (Pa). Blaise Pascal. 1623-1662 French physicist and mathematician

Télécharger la présentation
## Forces in Fluids

**An Image/Link below is provided (as is) to download presentation**
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.
Content is provided to you AS IS for your information and personal use only.
Download presentation by click this link.
While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

**Forces in Fluids**Chapter 13**What is pressure?**• The result of a force acting over a given area. • Pressure = Force/Area • What label? • N/m2 • 1 N/m2 is known as a pascal (Pa)**Blaise Pascal**• 1623-1662 • French physicist and mathematician • Performed some of the first experiments dealing with pressure**Fluid pressure**• Fluids: a substance that attains the shape of its container. Examples: both liquids and gases. • Fluid pressure changes with depth in a column of water and with altitude. • Fluid pressure in water does not depend on the volume or weight only the depth.**Air Pressure**• Air pressure at sea level is approx. 101 kPa. • Air pressure will decrease with increases in altitude. • Examples: flying in a plane, driving in the mountains**Pascal’s Principle**• A change in pressure at any point in a fluid is transmitted equally and unchanged in all directions throughout the fluid**hydraulics**• Uses Pascal’s principle and moving pistons with an enclosed pressurized fluid: • Examples: • Car brakes, jacks, and loaders**Problem:**• If a force of 30 N is placed on a small piston of a hydraulic device with an area of 2 cm2, what size of a load can the larger piston lift if the area of the larger piston is 80 cm2?**Bernoulli’s principle**• Swiss scientist • 1700-1782 • Explained the basis behind airplane flight. • As the speed of a fluid increase, the pressure decreases**buoyancy**• The ability of a fluid to exert an upward force on an object resulting in an APPARENT loss of weight of the object**Archimedes**• Greek mathematician • 287-212 B.C. • Best known for his theory that the buoyant force on an object is equal to the weight of the fluid displaced**Application of buoyancy**• Ballast tanks in submarines**Assignment:**• Pages 407-408 • 1-10, 12, 15, 17, 20, 26, 27 • Page 409 • 1-6

More Related