**Day 1:**

**Before Class**

- Problem set #9 posted, check it out.
- Rotational Systems
- Watch
*Parallel Axis Theorem*

**In Class**

- Collect Problem Set #8
- A day at the races. Some round objects are going to roll down a flat surface without slipping – a hollow ring, a solid sphere, a hollow sphere – all of different sizes and masses. What determines which one wins? You might think about this while watching the rotational systems video.

**After Class**

**Day 2:**

**Before Class**

**Oh, Wow, Surveys:**Please take the department survey at: https://sail.calpoly.edu/- Please take the “how can we improve this class” survey at: https://www.surveymonkey.com/r/sustain-W2016
- Please take the “how do I think about physics” survey at: https://www.surveymonkey.com/r/CLASS-W16
**The Diving Board Problem**- Barbel spinning in space
- (optional) Review these videos. Statics, and the Rotational Big Picture mechanics video paying particular attention to torque and change in angular momentum
- Watch this video: PS#8, Q1 and treatment of CM
- Watch this video: Spinning Skater What are the forces on a skater’s arms when she is spinning very fast?
- PS#8 Solutions Posted on main website.
- HEY! so I just changed (at 1:40 Wednesday afternoon) question #2 on PS #9 to include the following: let the radius of the disk = 10 cm and the mass = 2 kg. This allows us to evaluate the answers to see if they make sense to us.

**In Class**

*We consider this classic question*: Are you more stable at the top or bottom of a ladder?

**Day 3:**

**Before Class**

**Surveys:**Please take the department survey at: https://sail.calpoly.edu/- Please take the “how can we improve this class” survey at: https://www.surveymonkey.com/r/sustain-W2016
- Please take the “how do I think about physics” survey at: https://www.surveymonkey.com/r/CLASS-W
- Make sure you look at PS #9 Solving flywheel with hanging mass This is the solution to PS#10, Question #4, so make sure you attempt the question first. This video is from last quarter so the problem number is different.
- Solving the Ladder Problem, this is from last quarter, so the number of the problem is different
- See a video from last quarter regarding trebuchet.
- Also see this from BurningMan
- See Firehose Video
- PS#8 Solutions Posted on main website.

**In Class:**

- Your Final (Big) Exam! More practice.

**After Class**

**Day 4:**

**Before Class**

**Surveys:**Please take the department survey at: https://sail.calpoly.edu/- Please take the “how can we improve this class” survey at: https://www.surveymonkey.com/r/sustain-W2016
- Please take the “how do I think about physics” survey at: https://www.surveymonkey.com/r/CLASS-W16
- Bicycle Transmission,
- Solve problem #2 in problem set 11.
- See video from your colleagues on momentum cannon
- See video on Calculating Coefficient of Friction
- See posted solutions to BE#8
- See posted solutions to PS#9

**In Class:**

*Bring your bike to class day!*

**After Class: If you’re interested in an office hour Monday or Tuesday of exam week, please log your availability on this Doodle Poll**