AT Cycle 3

🔴❗2: F 9/18, 🟡❗4: F 9/18, 🔵❗5: F 9/18 - circular & friction problems (2)

Daily Check-in #4: circular motion

Today, we'll continue to work on the required problems on more advanced Newton's Law  from Chapter 6 in Halliday and one problem from Giancoli Chapter 5:

Support: 17, 25, 27, 35, 45, 70
Required: 23, 34, 51, 57, 58, 60, 68, 98, G42
Enrichment: 21*, 22, 25, 59, 103
* Requires calculus, skip if you haven't taken it yet.

Then, with any time remaining, we'll try to figure out how fast we could go around the Bristol Motor Speedway in Nascar Problem. (ANSWERS) You'll learn about how to approach banked turn problems.  We'll work in groups to try to figure it out.  And check this out...

Homework:  I recommend you finish the Nascar Problem (ANSWERS) AND the required problems from Ch 5/6.  ❗Assessment on Chapters 5 and 6 in Halliday plus banked turns on Friday, September 25th.  Watch the video below to review how to solve work/energy problems - Giancoli Chapter 8 #27.  The important thing in this video is to make sure that you understand how to make a "before & after energy diagram."  This method of solving energy problems is not something that is universal amongst physics teachers, but I do think that it is helpful and virtually foolproof, so I would like to see you use it.  In addition, you should be able to use the conservation of energy equation to solve energy problems.  This method is different than the "Work-Energy Principle" method, so you might want to also look that up in your textbook (p. 153 Halliday) and understand how it differs from the "conservation of energy" method.  Both methods work, but given the situation, one usually works better than the other.  Figure out why.

🟥 2: W 9/23, 🟨 4: T 9/22, 🟦 5: T 9/22 -  energy lab (1)

Today, we'll continue review of last year's material by doing a lab with energy. You'll need to find the coefficient of kinetic friction between a wooden block and the lab table. The only measurement devices are a meter stick and a balance. You cannot use any timing devices or motion sensors.  You'll focus on work lost to a non-conservative force.  

After you get a coefficient, do a secondary experiment to verify your results; you may use another measuring device for this simple verification experiment.  

If you finish early, you should try to find an expression for the coefficient using another method - Newton's Laws.  This part is not required in your notebook, so you can do it on a whiteboard in your group if you'd prefer.  

Homework:  Make sure your "lab write-up" completed in your lab notebook to be turned in.  Remember lab notebooks do not leave the classroom.  It's not a formal write-up.  Give it a title, and make sure you have a labeled diagram of what you measured.  Make sure to have some "before-and-after diagrams."  Then just your measurements and calculations.  This lab is due at the end of next class.  ❗Assessment on Chapters 5 and 6 in Halliday plus banked turns on Friday, September 25th (does not include energy).

❤️ 2: Th 9/24 lab, 💛 4: W 9/23 lab, 💙 5: Th 9/24 lab - energy lab (2) & energy problems

Today, we'll finish the energy lab you started last time.

HOUR 2
Daily Check-in: Elastic Potential Energy vs Hooke's Law Demo

Then, we'll do the following problems from Chapters 7 and 8 in Halliday to review energy problems from last year.  Make sure you follow the steps for making a "before and after diagram" for every energy conservation problem.

Support: Ch 7 #32, 36, 45; Ch 8 #19, 21, 36, 52, 55
Required: Ch 7 #30, 54, 62, 65; Ch 8 #30, 34, 56, 57, 63, 91
Enrichment: Ch 7 #79; Ch 8 #33, 35, 75, 78

Homework:  ❗Study for Assessment on Chapters 5 and 6 in Halliday plus banked turns NEXT CLASS - Friday, September 25th (does not include energy or momentum)    

OPTIONAL - energy lab #2 

*** IF YOU NEED PRACTICE WITH LINEARIZATION, THIS IS AN IMPORTANT LAB TO DO! ***

Today, we'll do a lab in ↩️ Pivot Interactives called "Stopping Distance (data given) BCF."  The goals of the lab are:

• Review how to perform conservation of energy problems.

• Review how to linearize graphs and find unknown values from mathematical relationships.  

• Familiarize or refamiliarize yourself with ↩️ Pivot Interactives as an online lab tool.

You'll work collaboratively to try to complete this online lab.  In typing your answers in Pivot Interactives, you might find it helpful to insert formulas in your responses.  Learn how to do that in Pivot Interactives HERE.