Monday we review a little to get back in shape from the week gone by. Be ready to finish your projects.

Before Class
  • See video on Inclined Plane using Only Energy (no kinematics at all!) (3.5 minutes)
  • See Veritassium video on how angular momentum provides increased stability against rotation.
  • Please watch this very short video of something you should never never do. Please ask yourself what happened here and why the one boy was hurt and not the others.
  • Please see: Explanation of Veritassium Bullet Problem
  • See your feedback and my response from Thursday's class, posted on main class website.
  • There is no office hour tomorrow, Tuesday.
  • Are you going to be on campus for Thanksgiving with no plans? If so, please consider joining us at a large community celebration with lots of people. Write me an Email if you are interested.
  • Please see everyone's statements about their present experience in our class. The statements and some of my thoughts are posted on the main class website.
  • I have posted the solutions for PS #8 on the main class website. I have the problem sets at my office. I'll return them in class. Come and get them earlier if you like.

During Class

  • Make some time to discussion projects.
  • Angular momentum and Gyroscopic stability. We have some cool demos for this.
  • Why must we spin frisbees or footballs to make them fly stable?
  • Precession - what is it?


Tuesday: We look at angular momentum as stability.

Before Class
  • No office hour today! I'm in a meeting. Sorry
  • Please do the third 10-question mechanics survey for discussion in class.
  • Here is a precession video I made recently to explain precession. It's likely my most well-received video to date.
  • read 7.5 in your text about precession.
  • See video on how gyroscopes can stabilize boats.
  • Please look over these activities on Gyroscope Worksheet. Can you try some of them?
  • Group project is due this weekend, Midnight Saturday night. Please post the website for your youtube video - make sure it's public so I can see it.
  • I posted PS#10 on the main class website. Please have a look as soon as possible.

In Class

After Class

Post Video Project by midnight Saturday night.


Wednesday
  • Please see Precession by Veritassium , a super professionally made video. You'll let me know if it's more helpful than my video.
  • Please see: Big Picture Rotation Video that includes precession.
  • See work on an inclined plane video.
  • I posted PS#10 (and PS#11, due the last day of class), on the main class website. It's due Monday after you return from Thanksgiving break.

During Class
  • Overhanging ball problem
  • What is counter steering on a motorcycle?


Thursday
Before Class
  • Read 7.6 on two irrelevant equations and trigonometry that you are allowed to use now.
  • See Trigonometry Video , now you're allowed to use trigonometry, but remember you can also always draw a picture if you're not sure.
  • See 1D, 2D Kinematics Video and then you're allowed to use those two unhelpful (in my opinion) equations, although hopefully, you've realized by now that you can get along without them just fine.
  • Please take the forth 10-question mechanics survey for discussion in class. Are we getting better at these?
  • Optional: Here is an old precession video I made a few years ago. It's long and slow with lousy graphics, but it has over 3000 views, so some people found it helpful: Pete's OLD Precession Video .

  • Are you going to be on campus for Thanksgiving with no plans? If so, please consider joining us at a large community celebration with lots of people. Write me an Email if you are interested.


During Class
  • finding coefficient of friction

After Class
Post your video link before midnight this Saturday!