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

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Page 1: (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

Science 8 Unit 3 - Fluids

Chapter 9

Forces influence the motion and properties of fluids.

Page 2: (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.

Page 3: (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

Balanced and Unbalanced Forces

BALANCED FORCES ARE...•Equal in strength•Opposite in direction•No movement

Page 4: (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

Balanced and Unbalanced Forces

UNBALANCED FORCES ARE...•Unequal in strength

•Cause a change in speed or direction

Page 5: (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

MASS vs. WEIGHT

Page 6: (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

Mass vs Weight

Page 7: (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

Buoyancy

BUOYANCY•The upward force on an object submerged in or floating on fluids.

•The Diver has neutral buoyancy.

Page 8: (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

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.

Page 9: (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

Buoyancy (Archimedes Principle)

Page 10: (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

Buoyancy

Page 11: (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

Buoyancy

DENSITY& BUOYANCYIf the density of the immersed object is greater than the density of the fluid, it will SINK

Page 12: (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

Buoyancy

AVERAGE DENSITYThe total mass of all substances that make up an object divided by the total volume.

Q. Could a lifejacket allow a statue to float?


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