Page 85, 1. A fluids resistance to flow is called :
viscosity Page 86, 2. The faster a fluid travels the ______ the pressure it exerts.
lower Page 86, 3. Daniel Bernoulli lived in the 18th century and was a _______ mathematician. Swiss
Students will be able to… Describe buoyant force – why things float Define Archimandrites principles – how it
relates to human activities - Explain the role of density State and apply pascal’s principle –
drawing – where it is used/how
Warm-up / quiz Notes/discussion Video clips / discussion Phet lab solid liquid gas – review sec. 1 Concept review section 1 chap. 3
Section 2 Fluids
Describe the buoyant force and explain how it keeps objects afloat.
Define Archimedes’ principle. Explain the role of density in an object’s ability
to float. State and apply Pascal’s principle.
Chapter 3
3. Insert the known values into the equation, and solve.
2
1 2
(19,000 N)(10.5 cm )
400 cmF
Section 2 Fluids Chapter 3
F1 = 500 N
Viscosity is the resistance of a gas or liquid to flow.
Bernoulli’s principle states that as the speed of a moving fluid increases, the pressure of the moving fluid decreases.
• Bernoulli’s principle is illustrated below: as a leaf passes through a drainage pipe from point 1 to point 2, it speeds up, and the water pressure decreases.
Section 2 Fluids Chapter 3
https://www.khanacademy.org/partner-content/mit-k12/mit-k12-physics/v/the-forces-on-an-airplane
https://video.search.yahoo.com/yhs/search;_ylt=AwrEZ7lAjA1cXxAA6H8PxQt.;_ylu=X3oDMTByMjB0aG5zBGNvbG8DYmYxBHBvcwMxBHZ0aWQDBHNlYwNzYw--?p=bernoulli+principle+you+tube&fr=yhs-pty-pty_email&hspart=pty&hsimp=yhs-pty_email#id=39&vid=2d5a1ab33957f066ff931b8191645206&action=view
https://video.search.yahoo.com/yhs/search?fr=yhs-pty-pty_email&hsimp=yhs-pty_email&hspart=pty&p=bernoulli+principle+you+tube+julius+summer#id=2&vid=d77f8cb505429732219b165259d6410d&action=view
http://www.aviation-for-kids.com/paper-airplanes.html
1. Going from solid to liquid to gas what is the main change in the molecules of a substance? The amount of energy the particles have in increased – temperature overall increased 2. What happens to the spacing between particles as you cool a substance down? Particles gather closer together overall motion decreases
1. Does a block of wood have a higher buoyancy force in water or oil ? water 2. If buoyant force is equal to the ______ of the volume of the fluid displaced. weight
1. Why do you weigh less in water? (what is this principle called?) It has a buoyant force pushing upwards – Archimedes principle 2. Hydraulic devices are based on ____ principle Pascal’s
1. What fluid did you use on the computer program that had the highest density? honey 2. What material placed in all fluids had the highest buoyancy force? Styrofoam
1. On an air plane wing where is pressure the lowest? Above the wing 2. Hydraulic devices are based on ____ principle Pascal’s
