Name Peter Sorrentino
Class Physics
Date 12/8
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.
Transparency 14, “Friction Depends on the Surfaces and the Applied Force.”
This transparency depicts a magnified view of the contact between two surfaces
and shows the relationship between the applied force and the force of friction.
(Figures 4-22 and 4-28)
Holt Physics
Copyright (c) by Holt, Rinehart and Winston. All rights reserved.
Chapter 4 Lesson Plan p. 1
Tuesday (Section 4-4 continued…)
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.
Classroom Practice, ATE p. 145, “Coefficients of friction.” This section offers
problems that can be used as teamwork exercises or for further demonstration at
the chalkboard or on an overhead projector.
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
Lab 90 minutes
Laboratory Experiments, Chapter 4, “Newton’s Second Law.” Students
determine the difference between the mass/force relationship’s theoretical
magnitude and experimental value.
Other Resource Options
NSTA sciLINKS, Topic: Friction, Code: HF2044. Students research Internet
resources related to friction.
Thursday
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.
Friday
Chapter 4 Assessment (Force and Newton’s Laws of Motion)
Chapter Tests, Chapter 4 Test A and Chapter 4 Test B.
Holt Physics
Copyright (c) by Holt, Rinehart and Winston. All rights reserved.
Chapter 4 Lesson Plan p. 2