HP Cycle 13

🟢 8: Th 11/19 - projectile motion

Mr. Piriya will teach this class.

Today, we’ll start looking at projectile motion. We’ll start by looking at projectiles launched horizontally. We’ll discover that projectiles move at constant velocity in the horizontal direction where there’s no net external force, whereas they move with constant acceleration (g) in the vertical direction where the external force is due to gravity. (Air resistance is ignored.) In order to solve projectile motion problems, we often split the problem into x- and y-components, and then combine x & y with time. 

With any time remaining, you'll start looking at problem solving

Presentation: Projectile Motion

Homework:  Quiz on projectile motion on Tuesday, December 1st.  For more support, watch the following two videos by Dan Fullerton.  They are both on projectile motion.  Watch only the first 11 minutes of the first video, and watch the entire second video.  The second video contains examples which you need to work through alongside Mr. Fullerton. 

🟩 8: F 11/20 - 📖 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:  Quiz on projectile motion on Monday, November 23rd.  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: M 11/23 - circular motion lab recap & basics

Quiz on projectile motion 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 Friday, December 4th!  

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