# 141 Winter 2018 Week 10

Monday:
Before Class

• Solutions to PS#8 are posted. Please have a look.
• Please see PS#10 – Due for Thursday’s 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 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 fill out this short survey to let me understand how the course was for you.
• People asked to see a copy of an old final exam. I won’t do that, but I will tell you that I’ve changed the order of topics after Spring 2016, so if you go to my general class website and look at MT#2 from Spring 2016 and earlier, there are plenty of problems that have components in them, representative of what you might expect to find on the final exam.

This week, you will be asked to fill out two surveys/evaluations for this class. One comes to you via Email (I think) from the university.
The other I have made to help me better understand your experience in the class and better serve future students.

During Class

After Class

Wow, last week of classes. We will review material while exploring new questions. Additionally, we will add trigonometry and you will be allowed to use the two kinematic formulas that most classes introduce in the first week of classes, now that you are able to solve questions without these formulas.

Tuesday:

Before Class

• See video on Fuzzy Dice
• Please see solutions posted for PS#9 on main class website.
• Please see PS#10 – Due for Thursday’s Class.
• Watch this video: Spinning Skater What are the forces on a skater’s arms when she is spinning very fast?
• Please see some old problems Solving flywheel with hanging mass This video is from winter quarter, 2016 so the problem number is different.
• Please fill out this short survey to let me understand how the course was for you.
• Solving the Ladder Problem, this is from winter quarter 2016, so the number of the problem is different

In Class:

• finding coefficient of friction

Wednesday:
first hour
Before Class

• Surveys: Please take the university survey for this class. The link was sent to you via Email.
• See Bicycle Transmission, and do the corresponding problem on PS#9.
• See video from your colleagues Toy Car Catapult
• Please fill out this short survey to let me understand how the course was for you.
• Please fill out the university’s evaluations of this course.
• Please see solutions posted for PS#9 on main class website.
• Calculate the coefficient of friction two different ways. Knowing that the angle that it slid was around 37 degrees (I think), and then when we spun the table:
• radius on turn table: 0.18 m
• height of turn table above the ground: 1.08 m
• horizontal distance traveled: 0.7 m
• Solutions for PS#10 posted.

In Class:

• Bring your bike to class day! we explore bicycle transmission.
• Hand in your corrections for project #2. This could be in a form of a new video or a written document.

Thursday:

Before Class

• See video on solution for 2D inelastic collision from a problem set from years past.
• Please fill out this short survey to let me understand how the course was for you.
• please also fill out the university’s evaluations of this course. The last day to do this is tomorrow.
• I’ll post the class responses for both evaluations for you to read as soon as I get them, so please make sure your voice is heard.
• See a video from last quarter regarding trebuchet.
• Also see this from BurningMan

Office Hours: Friday Office Hours are 11 AM. I will be around my office most of Monday (but not before 10 AM) and Tuesday. I will not tutor or run a review session. But if you have a question, I’ll be glad to answer, especially if you are a group.

In Class

• Revisiting parabolic trajectory: shooting the monkey from a tree.

FINAL EXAM: Tuesday, March 20, 7:00 PM, in our classroom.