# AT Cycle 5

## 9/30 - 10/6

F 9/30

M 10/3

T 10/4

Th 10/6

### π΄ 2: M 10/3a, π‘ 4: F 9/30 - 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.

Homework: Make sure your "lab write-up" completed in your lab notebook to be turned in. 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 in class on Friday, September 30th.

### π₯ 2: M 10/3b, π¨ 4: M 10/3 - energy lab (2)

LAB SAFETY: Students will be using a modified Atwood machine, and if heavy masses are used, injury could result if they fall on a foot. Please pay attention to all lab instructions, and only use equipment for their instructed use.

Today, we'll continue the 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.

Finally, if you finish all of the above, move on to the energy problems in the next post.

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 in class on Monday, October 10th.

### β€οΈ 2: T 10/4, π 4: Th 10/6a - energy review problems (1)

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

Today, 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

We'll continue on this set next class.

Homework: Energy problems due in βοΈ Google Classroom by Sunday, October 9th. QUIZ on energy and momentum Friday, October 14th.

### π 2: Th 10/6, π 4: Th 10/6b - energy review problems (2)

Today, we'll continue working on the 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

With any time remaining, start the momentum problems in the next post.

Homework: Energy problems due in βοΈ Google Classroom by Sunday, October 9th. QUIZ on energy and momentum Friday, October 14th. Watch this video for a momentum review: