States of Matter Fluids

Activty Will it float? Will it float? Rock Rock Potato Potato Paper clip Paper clip Pen Pen Pencil Pencil Coin Coin Candle Candle Eraser Eraser

Objectives Describe the buoyant force and explain how it keeps objects afloat. Describe the buoyant force and explain how it keeps objects afloat. Define Archimedes’ principle. Define Archimedes’ principle. Explain the role of density in an object’s ability to float. Explain the role of density in an object’s ability to float. State and apply Pascal’s principle. State and apply Pascal’s principle. State and apply Bernoulli’s principle. State and apply Bernoulli’s principle.

Describe the buoyant force and explain how it keeps objects afloat. Define Archimedes’ principle.

Pressure Pressure = force / area = F / A Units = Newton per square meter = pascal

Buoyant Force

Buoyancy USS Dwight D. Eisenhower Aircraft Carrier Dimensions Length of flight deck: 1,092 ft. Width of flight deck: 252 ft. Height keel to mast: 244 ft. (equal to 24-story building) Area of flight deck: 4.5 acres Weight of carrier: 95,000 tons

Archimedes’ Principle

Explain the role of density in an object’s ability to float.

Density and Floating

Mythbusters 40-mythbusters-lets-talk-buoyancy-video.htm 40-mythbusters-lets-talk-buoyancy-video.htm 40-mythbusters-lets-talk-buoyancy-video.htm 40-mythbusters-lets-talk-buoyancy-video.htm

State and apply Pascal’s principle.

Pascal’s Principle F 1 / A 1 = F 2 / A 2

State and apply Bernoulli’s principle.

Bernoulli’s Principle