SECTION
FRICTION IS A FORCE THAT OPPOSES MOTION.
3.2 Reading Study Guide B
BIG IDEA Newton’s
KEY CONCEPT
laws apply to all forces.
Friction is a force that opposes motion.
Review
Gravity increases with greater mass and decreases with greater distance.
Take Notes
Friction occurs when surfaces slide against each other. (p. 85)
1.
Fill in the four-square diagram for friction.
Characteristics
Definition
CHAPTER 3
Gravity, Friction, and Pressure
Examples
FRICTION
A. Forces and Surfaces (p. 86)
2.
Fill in the main-idea chart with details about the factors that determine the
friction between two surfaces.
Several factors determine the
friction between two surfaces.
3.
Which would result in greater friction, riding a sled down a snowy slope or
pulling it across a sidewalk? Explain why.
4.
Is there more friction between a heavy wooden box and the floor, or a light
wooden box and the floor?
Nonexamples
Copyright © by McDougal Littell, a division of Houghton Mifflin Company
I.
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5.
Look at the diagram below. Will it take more force to move the chair in
position A than position B? Why or why not?
A.
B.
B. Friction and Heat (p. 88)
6.
How does friction produce heat? What are some examples of the heat
produced by friction?
Copyright © by McDougal Littell, a division of Houghton Mifflin Company
7.
Fill in the four-square diagrams for fluid and air resistance.
Characteristics
Definition
Examples
8.
FLUID
Characteristics
Definition
Nonexamples
Examples
AIR
RESISTANCE
Nonexamples
CHAPTER 3
Gravity, Friction, and Pressure
II. Motion through fluids produces friction. (p. 89)
What is terminal velocity? When is it reached?
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