Name
Peter Sorrentino
Class
Physics
Date 2/19
_
Chapter 4: Forces and the Laws of Motion (Continued)
Monday
Section 4-4: Everyday forces
Objectives
1. Explain the difference between mass and weight.
2. Find the direction and magnitude of the normal force.
3. Describe air resistance as a form of friction.
4. Use coefficients of friction to calculate frictional force.
National Science Education Standards Covered
UCP 1: Systems, order, and organization
UCP 2: Evidence, models, and explanation
UCP 3: Change, consistency, and measurements
UCP 5: Form and function
SAI 1: Abilities to do scientific inquiry
SAI 2: Understanding about scientific inquiry
ST 1: Abilities of technological design
ST 2: Understanding about science and technology
HNS 3: History of science
SPSP 3: Natural hazards
SPSP 4: Risks and benefits
SPSP 5: Science and technology in society
Focus 5 minutes
Visual Strategy, ATE p. 141. This feature probes students’ understanding of the
concept of weight, as shown in Figure 4-19.
Motivate 10 minutes
Physics and Its World, pp. 164–165. This feature highlights key developments
and people who contributed to our understanding of physics between 1540 and
1690.
Teach 30 minutes
Transparency 13, “Static and Kinetic Friction.” This transparency illustrates that
both static and kinetic friction oppose the force applied to a jug of juice. (Figure
4-21)
Demonstration 6, ATE p. 143, “Static vs. kinetic friction.” This demonstration
shows that kinetic friction is less than static friction.
Demonstration 7, ATE p. 143, “Friction of different surfaces.” This
demonstration shows students that the force of friction depends on the surface.
Holt Physics
Copyright (c) by Holt, Rinehart and Winston. All rights reserved.
Chapter 4 Lesson Plan p. 1
Tuesday
Teach 30 minutes
Demonstration 8, ATE p. 144, “Friction and surface area.” This demonstration
shows the relationship between surface area and frictional forces.
Sample Problem 4C, p. 145, “Coefficients of friction.” This problem
demonstrates how to calculate the coefficient of static friction using the maximum
value of the force of static friction and the normal force.
Sample Problem 4D, p. 146–147, “Overcoming friction.” This problem
demonstrates how to solve problems involving the force of friction.
Classroom Practice, ATE p. 146, “Overcoming friction.” This section offers
problems that can be used as teamwork exercises or for further demonstration at
the chalkboard or on an overhead projector.
Close 10 minutes
Section Review Worksheet 4-4, “Everyday Forces.” Concept Review activities
reinforce fundamental knowledge from this section.
Wednesday
Review and Assess
Chapter 4 Review
Chapter Summary, p. 150. This page summarizes the key concepts and
equations of the chapter.
Teaching Tip, ATE p. 150. This tip suggests that students prepare a concept map
for the chapter.
Mixed Review, pp. 154–157. Assign items 45–69.
Performance assessment, p. 157. This section extends students’ understanding of
the implications of the topics of this chapter.
Portfolio projects, p. 157. This section suggests portfolio projects that extend
students’ understanding of the implications of the topics of this chapter.
Technology & Learning, p. 156. Students program their graphing calculators to
create a graph of normal force versus force of static friction to determine what
applied force would be necessary to keep objects sliding in various situations.
Thursday
Chapter 4 Assessment
Chapter Tests, Chapter 4 Test A and Chapter 4 Test B.
Friday
Review of Chapters 1-4
The science of physics,
Motion in one dimension,
Two dimensional motion and vectors and
Forces and the laws of motion
Holt Physics
Copyright (c) by Holt, Rinehart and Winston. All rights reserved.
Chapter 4 Lesson Plan p. 2
Holt Physics
Copyright (c) by Holt, Rinehart and Winston. All rights reserved.
Chapter 4 Lesson Plan p. 3