HP Cycle 12

🟢 8: F 11/14 - friction lab 

Today, we'll introduce the idea of quantifying friction.  We'll talk about where friction is helpful (walking and braking) where it is not (in lab situations). We'll also talk about the difference between static friction and kinetic friction. We'll talk about how to increase the friction between two surfaces (think Mr. Miyagi from Karate Kid). Finally, we'll do a lab to find the mathematical relationship between the normal force and the force of friction.

Handout:  Friction Lab - Write your responses on a separate sheet of paper to be turned in.  

Virtual Alternative:  LAB - Friction (virtual) if you are absent.  Make a copy into your own Google Drive.

Homework:  Finish what you can in the Friction Lab.  Whole lab is due at the beginning of class on Friday, November 14th, but you really should be able to finish it in class today.  

🟩❗8: M 11/17 - 📖 friction problems

Today, we'll first recap with this Friction Presentation.  If you did not watch the friction video, watch that first.  Then, we'll work on on friction problems collaboratively.  

Homework:  Work on any problems you did not finish above. 

Optional Extra Practice:  Chapter 5 in your 📖textbook:  #27, 29, 31, 32, 71, 73 also available in Mastering Physics so you can check your answers.  You may also try #11-17 on page 2 of Big Newton's Law Packet.  SOLUTIONS to pp 1-2 of Packet. 

💚 8: T 11/11 - vectors at angles

Today, we'll learn about vectors that are at angles.  We'll see how to add two vectors that are perpendicular to get a diagonal "resultant" vector.  We'll learn to resolve diagonal vectors in x- and y-components using trigonometry (SOH CAH TOA).  Finally, we'll begin to explore how we can use Newton's 2nd Law with diagonal vectors.  

Presentation:  

Homework:  If you'd like to review more on vector addition, you can watch these videos: