# AT Cycle 12

## 11/14 - 11/17

T 11/14

W 11/15

Th 11/16

F 11/17

JUMP TO LESSON:

### 🔴 2: W 11/15a, 🟡 4: T 11/14, 🔵7: T 11/14 - ✏️ moment of inertia lab (3)

If you have not finished collecting data, focus on collaboratively carrying out the investigation to find the moment of inertia of the PVC-T. You may have to perform your experiment several times to engineer the best possible set-up to get good data. Your goal is to get a great graph or two.

If you have already finished collecting data and have printed your graphs, then we'll spend one whole period analyzing and interpreting the lab data. We'll first utilize the Identify and Interpret (I2) Strategy (from BSCS) to identify important features in our graphs. Then, we'll use the Writing Evidence-Based Body Paragraphs (from Rubano/McVay based on CER) organizer to help you start writing your paragraph about the data. We'll focus on the comparison between your predictions and your actual data and communicating similarities and differences. We'll also focus on writing a high quality evidence-based paragraph. You can use these two strategies for any paragraph in this or any other lab. You may even adapt these strategies for writing in your other subjects.

When you finish, work on your INDIVIDUAL write-up.

Lab reports are INDIVIDUAL! You may share ideas in your lab groups verbally, but all the writing must be your own - your own words AND your own sentence/paragraph structure. My suggestion is that you discuss and listen to others in your group. Do not write anything at this time. Then let a couple minutes pass before writing everything in your own words. Do not share your document with any other students. Do not cut and paste any phrases into email, text, or a messaging app. Do not share screens if you are video chatting. Do not dictate or write down sentences while anyone in your group is talking. If I detect that your work is not completely your own, you could suffer serious consequence to your grade and/or disciplinary action, so be smart about this!

Below is an example of similar sentence structure (from my Physics Honors course) which is considered plagiarism:

Student 1:

Building off the previous equation (a ∝ F/m), we know that we have established some sort of relationship between force, mass, and acceleration. We can build off of this and create a mathematical equation using the equal sign. To do this, we need to establish another variable, called C. This will be a constant, and will help us establish a more algebraic equation.

Student 2:

Expanding on the earlier equation (a ∝ F/m), it is evident that we have established a connection between force, mass, and acceleration. We can further develop this relationship by formulating a mathematical equation using the equals sign. To achieve this, we introduce a new variable, denoted as C. This variable represents a constant and will play a crucial role in creating a more algebraic equation.

Homework: If you just finished getting data, make sure you have diagrams of set-ups, free body diagrams, and prediction(s) for the graphs in your lab notebook. Also, you should find an algebraic expression for your moment of inertia based on your free-body diagrams. Make sure you know how you will extract the necessary information from your graph. Consider your assumptions and sources of error before you try to analyze your data. If you got graphs, print them for next time!

Finish writing your analysis based on the strategies we discussed in class. INDIVIDUAL lab analysis is due to ✏️ Google Classroom by Sunday, November 19th at 10pm. GROUP lab analysis is due to ✏️ Google Classroom by Friday, November 17th at 10pm. One question on the quiz will be to come up with a real-world application of moment of inertia and why you might want the moment of inertia of some object to be higher or lower. You'll get a bonus point if each person if you pick an application that 4 people or less (including you) in the course this year have chosen. (The application has to be a good demonstration of moment of inertia of course.) The open-notebook lab quiz will indeed be in the lab category as an assessment of your understanding of the lab. Moment of Inertia Lab Quiz - Tuesday, November 21st.

### 🟥 2: W 11/15b, 🟨 4: W 11/15, 🟦 7: W 11/15a - moment of inertia analysis

Today, just work on your moment of inertia INDIVIDUAL lab analysis from last class and collaborate with your group on ideas for this write-up.

Homework: Finish writing your analysis based on the strategies we discussed in class. INDIVIDUAL lab analysis is due to ✏️ Google Classroom by Sunday, November 20th at 10pm. GROUP lab analysis is due to ✏️ Google Classroom by Friday, November 18th at 10pm. One question on the quiz will be to come up with a real-world application of moment of inertia and why you might want the moment of inertia of some object to be higher or lower. You'll get a bonus point if each person if you pick an application that 4 people or less (including you) in the course this year have chosen. (The application has to be a good demonstration of moment of inertia of course.) The open-notebook lab quiz will indeed be in the lab category as an assessment of your understanding of the lab. Moment of Inertia Lab Quiz - Tuesday, November 21st.

### ❤️ 2: Th 11/16, 💛 4: F11/17a, 💙7: W 11/15b - rolling without slipping problems (1)

Check-In: Rolling without slipping

Today, we'll be working on problems from last class rolling without slipping:

Required: 1992M2 a-b, 1997M3 a-d (do a with forces by doing b and c first), 1991M2

Enrichment: go to the AP Central, and do additional problems with rolling without slipping.

Homework: Rolling without slipping problems due to ✏️ Google Classroom on Tuesday, November 21st at 10pm. INDIVIDUAL lab analysis is due to ✏️ Google Classroom by Sunday, November 19th at 10pm. GROUP lab analysis is due to ✏️ Google Classroom by Friday, November 17th at 10pm. Moment of Inertia Lab Quiz - Tuesday, November 21st.

### 📕 2: F 11/17, 📒 4: F 11/17b, 📘7: Th 11/16 - rolling without slipping problems (2)

Check-In: Rolling without slipping

Today, we'll continue working on problems from last class rolling without slipping:

Required: 1992M2 a-b, 1997M3 a-d (do a with forces by doing b and c first), 1991M2

Enrichment: go to the AP Central, and do additional problems with rolling without slipping.

Homework: Rolling without slipping problems due to ✏️ Google Classroom on Tuesday, November 21st at 10pm. INDIVIDUAL lab analysis is due to ✏️ Google Classroom by Sunday, November 19th at 10pm. GROUP lab analysis is due to ✏️ Google Classroom by Friday, November 17th at 10pm. Moment of Inertia Lab Quiz - Tuesday, November 21st. Make sure all rolling problems are finished. Watch this video on rolling WITH SLIPPING: