(c) McGraw Hill Ryerson 2007 Science 8 Unit 3 - Fluids Chapter 9 Forces influence the motion and properties of fluids.

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Presentation transcript:

(c) McGraw Hill Ryerson 2007 Science 8 Unit 3 - Fluids Chapter 9 Forces influence the motion and properties of fluids.

(c) McGraw Hill Ryerson 2007 Forces FORCE Anything that causes a change in the motion of an object. A push or pull.

(c) McGraw Hill Ryerson 2007 Balanced and Unbalanced Forces BALANCED FORCES ARE... Equal in strength Opposite in direction No movement

(c) McGraw Hill Ryerson 2007 Balanced and Unbalanced Forces UNBALANCED FORCES ARE... Unequal in strength Cause a change in speed or direction

(c) McGraw Hill Ryerson 2007 MASS vs. WEIGHT

(c) McGraw Hill Ryerson 2007 Mass vs Weight

(c) McGraw Hill Ryerson 2007 Buoyancy BUOYANCY The upward force on an object submerged in or floating on fluids. The Diver has neutral buoyancy.

(c) McGraw Hill Ryerson 2007 Buoyancy The amount of buoyant force that would push up against the object immersed in the fluid equals the force of gravity or the weight of the fluid that the object displaces.

(c) McGraw Hill Ryerson 2007 Buoyancy (Archimedes Principle)

(c) McGraw Hill Ryerson 2007 Buoyancy

(c) McGraw Hill Ryerson 2007 Buoyancy DENSITY& BUOYANCY If the density of the immersed object is greater than the density of the fluid, it will SINK

(c) McGraw Hill Ryerson 2007 Buoyancy AVERAGE DENSITY The total mass of all substances that make up an object divided by the total volume. Q. Could a lifejacket allow a statue to float?