Lesson 2. Force These are the terms and concepts you should master to the
level you have set for yourself:
 Interactions and Forces
 Graphical Vector Addition
 Vector Addition Using Components
 Inertia and Equilibrium: Newton's First Law of Motion
 Interaction Pairs: Newton's Third Law of Motion
 Gravitational Forces
 Contact Forces
 Tension
 Fundamental Forces
Assignment 1
Take a close look at the terms and concepts listed above. Use the search
box to find definitions and brief explanations. For the first part of this
lesson, a descriptive understanding is more important than a mathematical
one. Think about how you would explain the concept to someone else, and make
sketches and notes in your Learning Journal.
Assignment 2
Master the Concepts from the publisher's companion website.
Study each of the items in the Mastering the Concepts portion of the
companion website. Use the search box to check on any terms that are unclear or
unfamiliar.
Now turn your attention to the equations listed in the Concepts.
Search for the meaning of each term in the equations, and set aside a page or two in your Learning Journal for a
complete summary of the
equations, including the definitions of each term.
Explore the
Physics video playlist from The Kahn Academy for presentations related
to this lesson.
Assignment 3
Work with the Interactives listed in the box in
the upperleft corner of the
companion website.
A Note About the "Interactives"
The companion website for this lesson includes some "Interactives" that are
intended to help you develop a dynamic mental picture of the principles they
portray. As technically correct and cleverly designed at these features might
be, they usually require special explanation of how to use the and how to learn
from them—which is lacking. For this reason, you
should not feel frustrated at being unable to use them.
Assignment 3
Check your skills with the
MultipleChoice Quiz.
Finally, browse these two resources for material relevant to this lesson:
