Physics and Measurement
Work and Kinetic Energy
Linear Momentum and Collisions
Rigid Body Rotation
Rolling Motion and Ang. Momentum
Superposition and Standing Waves
Heat and the First Law
Entropy and the Second Law
Old WebHW Resources
These on-line homework resources are archived as practice problems. Ignore
the due dates, and please note that no grades will be recorded. The chapter
titles are from another textbook. Have fun!
How to Use the On-line Content
The Physics 221 website is organized around content areas that
correspond to chapter boundaries within your textbook. You
access the content areas by clicking on the menu items to the left.
each chapter area, there will be one or more content pages.
Each content page will contain a short summary of the
target content, along with WebHW problems that relate to the target
content. The summary information contained within a content page
is meant to provide an overview to facilitate your efforts to solve
the WebHW problems. Your textbook will contain far more details,
descriptions, figures and worked examples. You should
always read the corresponding sections within your textbook before
referring to the on-line content.
The suggested approach for learning the material in each subject area
- Begin by reading the
associated chapter in your textbook. Do this well
before the subject is discussed in class. Watch any
Mechanical Universe films contained within the content area.
- Jot down any questions you have, and ask them in class.
- Now you are ready to begin work on the WebHW problems. Go
to each content page, read the summary information, and then work
as many of the WebHW problems as you can. Keep careful
notes in your WebHW Solutions Manual for all problems you
- Most folks will not be able to work every WebHW problem on the
first attempt. Most of the time, this will mean that you
have not understood some portion of the reading material. Go
back to your textbook, read the material again that relates to the
problem you are trying to solve, re-read the summary material, and
try the WebHW problem again. Remember to update your
WebHW solutions manual each time you re-attempt a problem.
- Repeat step 4 at least one more time. Most folks need to
read technical material at least three times before
it fully sinks in.
- If after three attempts you continue to have difficulties, stop by for an office visit.
Do's and Don'ts
- Don't spend enormous amounts of time spinning your wheels
on any one WebHW problem. Every single
WebHW problem can be worked in just a few minutes if you know what you
- Don't try "shotgun" approaches, or try to guess
the answer to avoid working the problem. If you get the
correct answer but don't understand why the answer is correct,
stop by for an office visit.
- Do keep a detailed WebHW Solutions Manual. This
will provide your best source of study materials just before a
quiz or exam.
- Do stop by for an office visit if you are stuck, but be
sure to bring your WebHW Solutions Manual with you. I
can usually spot a mistake very quickly by looking at your
work. I absolutely will not work a problem for you unless
I can see what you have already done.
- Do stop by for an office visit if you just can't get
started on a problem. In this case, I will get you oriented
so you can solve the problem on your own.