HP Cycle 16

🟢 8: W 12/10 - 📖 projectile motion problems

Today, we'll continue the Projectile Motion Presentation by starting to look at projectiles launched at an angle.  We'll look at a special case of a projectile that is caught at the same height as it was launched.

Then, we'll be practicing what you have learned previously about projectile motion.  

Homework:  Study for Quiz on projectile motion on Friday, December 12th.  Finish any problems that you have not finished. 

Optional Extra Practice:  Do 📖 textbook problems from Chapter 3:  #28, 32, 60, 63, 66, 79, (optional 31, 33, 57, 64 - launched at an angle).  Projectile Motion CompuSheets page 1 (Solutions).  

The following videos may help with one of the problems in 📖 textbook Chapter 3:

OPTIONAL ENRICHMENT (for those thinking of taking AT Physics especially):

Learn on your own about projectiles lauched at an angle by watching the rest of Dan Fullerton's video on projectile motion (minute 11 until the end) and more practice problems below.  

Optional Enrichment:  Do 📖 Mastering Physics Chapter 3 problems "Ch 3 Projectile Problems Set 2":  35, 36, 62, 67, 69, 73.

Optional Extra Practice:  Projectile Motion CompuSheets page 2 (Solutions) 

Additionally, you can watch these more advanced videos on projectiles launched at angles and landing at a different height:

🟩 8: Th 12/11 - ↩️ Pivot circular motion (1)

Today, we'll talk very briefly about "uniform circular motion."  We'll talk about some variables that we can observe regarding an object traveling in a circle at constant speed.  Then, we'll start to work on a lab in ↩️ Pivot Interactives called "Forces in Circular Motion."  I would recommend dividing the work in taking data - first discuss as a group how you will take the data in each part and come to consensus; then each person take their data.  

Homework:  Finish at least taking data for your part the ↩️ Pivot Interactives lab.  Whole lab is due tonight, Thursday, December 11th at 10pm.  Remember, no late work accepted in ↩️ Pivot, so start early and aim to finish early.  Make sure one person in your lab group pastes a screenshot of the graph on the shared document in ✏️ Google Classroom.

💚❗8: F 12/12 - circular motion lab recap & basics

Quiz on projectile motion on TODAY!

Today, we'll discuss what you found from your part of the lab ↩️ Pivot lab "Forces in Circular Motion".  We'll put together the findings from each of the three different groups (see ✏️ Google Classroom for the assignment), and we'll discuss how we might come up with one mathematical model for centripetal force.  

Then, we'll further explore uniform circular motion quantitatively by investigating a car losing control when rounding a curve in icy conditions.  We'll discover how we can apply previous knowledge of Newton's Laws in solving this problem and discuss the reasons we should SLOW DOWN when driving in adverse weather conditions.

We'll do the following sample problem:  It takes a 900-kg racing car 12.3 seconds to travel at a uniform speed around a circular racetrack of 90.0-meter radius.

• What is the centripetal acceleration of the car?

• What provides the centripetal force?

• What is the minimum coefficient of static friction required to make the turn without slipping?

Presentation:  Circular Motion Example Problems (only slides 1-6 today)

Homework:  Quiz on Uniform Circular Motion on Thursday, December 18th!  

Optional Extra Practice:  Centripetal Acceleration and Force CompuSheets.  ANSWERS.