Also, see the video about Doc Edgerton's Photograph of Denny Shute hitting the golf ball

Read section 2.4 (Vectors and Direction)

Complete your project from Thursday. Come to class with questions.

We will meet in Baker Science, 180-262 where we used the computers Thursday. We will meet here again Monday because I think people may want to use the computers again. We will not make this our regular room. We will return to 53-201 tomorrow, Tuesday.

I have your graded PS#1 and I posted the solutions. I have the following to report:

I spent a long time on extensive solutions, I encourage you to read through them because...

The grader didn't mark everything wrong that was wrong, so you really need to look at the solutions to see what you missed.

In general, there were not enough drawings!!! Please make a drawing for (almost) all the problems.

Check out PS #3 posted on main class website.

During Class

MEET in 180-262 where we used the computers on Thursday!

So ends two weeks of 141. How is your experience so far?

Work on your project. Finish it up!

Tuesday: We will explore more complicated dynamics problems: the elevator problem.

Take this 10-question conceptual physics survey. There will be 4 more. I expect that everyone will do all do them and we will review the results in class to learn as much as possible. Full disclosure: It really has 13 questions including your name.

Solve this problem as part of PS #3. Come in tomorrow with questions if you don't follow what to do.

PS#2 solutions posted. Please see on main class page.

I read through your feedback and responded to a few of them. Please see the complete student statements - link on the main class website.

Meet in regular room: 53-201.

During Class

Meet in regular classroom, 53-201

Big Exam #2 Be ready to demonstrate perfect dynamics protocol.

How do you keep the water in the bottom of the bucket?

A string breaks

After Class: Would you like to have a garden, or learn about aquaponics, growing mushrooms? Bee keeping? Tree nursery? Please consider coming to the Student Experimental Farm this Sunday at 11 AM, or thereabouts. How do I get to the SEF?

Read 2.8, a review about the lens method, updated to include vectors

Important to consider for today's class... your life may depend on it. You have two balls to throw against a door in order to close the door with the impact of the ball. One ball is perfectly elastic, and the other one is perfectly inelastic. Which ball will be most effective at closing the door? Why?

If you like, please check out 8.4 from the original OpenStax textbook to see how the rest of the world looks at elastic collisions in 1-Dimension using simultaneous equations. Please reflect on the following two questions

How do you compare this chapter to the chapters that I write?

How do you compare this method to the picture drawing method that I present in the video?

Optional reading on NPR about active learning in Physics Education Research. The author, Carl Weiman who won the Nobel Prize in Physics for Bose Einstein Condensation gave a talk at Cal Poly some 12 years ago calling on us to evaluate and innovate teaching with the same scientific process we use for other scientific research. Since then, he’s become prominent in Physics Education Research. He’s published a considerable amount about active learning strategies and over the years has become more outspoken about the futility of the lecture model and need to change.

MondayVectors in the four lenses. Also, proving energy formulas.

Before Classmake this our regular room. We will return to 53-201 tomorrow, Tuesday.notDuring ClassWe will explore more complicated dynamics problems: the elevator problem.Tuesday:Before ClassDuring Classdynamics protocol.After Class:Would you like to have a garden, or learn about aquaponics, growing mushrooms? Bee keeping? Tree nursery? Please consider coming to the

Student Experimental Farm this Sunday at 11 AM, or thereabouts. How do I get to the SEF?

Optional video: Veritasium on how they measured gravity waves. 2017 Nobel Physics Prize!

: Springs and ReviewWednesdayBefore Classreadthrough PS #3Springs!During ClassThursday:Before ClassDuring ClassHand in Project #1

Elastic Collisions