### Honors Physics

#### What if you pull or push a block at an angle?

2: Th 12/20, 5: Th 12/20, 7: Th 12/20QUIZ on adding vector forces and inclined planes LAB QUIZ on Y-tension lab QUIZ and TODAY.Today, we'll look at one other kind of problem - we pull or push a block at an angle. We'll see that when we do this, the normal force is NOT equal to the force of gravity! We'll try to finish Friction & Vector Forces during class. |

#### How do pulleys work with inclined planes?

2: W 12/19, 5: T 12/18, 7: W 12/19
Today, we'll try some even harder pulley problems. If you need some ideas on how to approach these problems, you can watch the video below, but don't forget to write a ΣF statement in the y-direction to get your normal force for the mass on the incline.
Handout: Table Top Pulley Problems, Solutions #3-4Homework: QUIZ on adding vector forces and inclined planes and LAB QUIZ on Y-tension labFinish Table Top Pulley Problems #3-4. LAB QUIZ on Friction 2 lab on Friday, January 4th. - Thursday, December 20th. (Pulley problems not included on quiz.) |

#### How can you account for friction on an inclined plane?

2: M 12/17, 5: M 12/17, 7: T 12/18Today, we'll perform a lab to check our understanding of friction and inclined planes. Handout: Mu Shoe LabHomework: QUIZ on adding vector forces and inclined planes and .LAB QUIZ on Y-tension lab LAB QUIZ on Friction 2 lab on Friday, January 4th.- Thursday, December 20th. |

#### What is the best coordinate system choice for inclined plane problems?

2: F 12/14, 5: F 12/14, 7: F 12/14. Lab quiz today on Y-tension labToday, we’ll look at how we can apply what we know about vectors in two dimensions to inclined plane problems. The key to inclined plane problems is picking a coordinate system that makes sense. We must shift our thinking from a traditional horizontal-vertical coordinate system to a slanted coordinate system. We'll start with a practice assessment based on the video you watched for homework last night. If you did not watch the video, you'll watch it during this time. We'll extend the discussion to link to our inclined plane lab that we performed a long time ago. We'll talk about what factors affect the motion of an object on an inclined plane theoretically and in real life.With any time remaining, work on page 6 #1-4 only of the Newton's Second Law packet which are also for homework. Homework: .Lab quiz on Y-tension lab next class |

#### How can you find the mass of a mystery object using tension at an angle?

2: Th 12/13, 5: W 12/12, 7: Th 12/13Today, we'll look at how Newton's Second Law acts in two dimensions by performing a lab where we try to find the mass of a mystery object using two dimensional forces. See below for set-upIf you have any trouble understanding the calculations here, check out the following video below. The strategy is to draw a free body diagram of the knot. (If the knot is made out of ideal or massless string, it does not have a force of gravity on it.) Homework: . Finish your lab write-up in your lab notebook. Answer the following questions as part of your analysis: (1) As you pulled the strings so that the angle between the strings increased, how did the tensions change? (2) Is it possible to pull the strings so that both strings are horizontal? Why or why not? Then watch at least the first 19 minutes of the video below the homework section. Take notes while you watch, and utilize the pause and rewind buttons as needed. In this video, we’ll look at how we can apply what we know about vectors in two dimensions to inclined plane problems. The key to inclined plane problems is picking a coordinate system that makes sense. We must shift our thinking from a traditional horizontal-vertical coordinate system to a slanted coordinate system. Lab quiz next class (Friday) on Y-tension lab |

#### What are component vectors? How can we use them to add vectors?

2: T 12/11, 5: T 12/11, 7: W 12/12Today, we'll see how we can add vectors that are not at right angles to each other. We will learn to break vectors into x- and y- components and why that is useful to us. Do Chapter 3 Problem #29. Then start your homework in groups.Homework: Do Chapter 3 #22, 26, 38, 43 on vector addition. Solutions. If you'd like to review more on vector addition, you can watch this video (Ignore i-hat & j-hat notation): |

#### How well do you understand Newton's Laws?

2: M 12/10, 5: M 12/10, 7: M 12/10Unit 3 Exam Today on Newton's Laws in one-dimension.Homework: Work on your Newton's Second Law lab! |

#### How do you study for the Newton's Laws test?

2: F 12/7, 5: Th 12/6, 7: F 12/7Today, we'll start with corrections to the Newton's Second Law quiz, so that you know what you need to work on. Don't forget to do your usual reflection (aka metacognition). Then, we'll discuss studying strategies that will help you with every test. Finally, if there's time, you can practice these study strategies and do some practice problems.Homework: Study for Newton's Laws Unit Test next class - Monday, December 10th. All tests are cumulative. |

#### What do we now know about our Newton's Second Law lab?

2: W 12/5, 5: W 12/5, 7: Th 12/6Today, we'll have the Chromebook cart so that you can revise your Newton's Second Law lab that we performed last month. You should have a new perspective on your results! As a group, you will add a theoretical analysis to the lab including free body diagrams and proportionality constant. You will additionally be submitting an individual error analysis now that you have more skill and knowledge. Resource: all about experimental errorHomework: Finish your Newton's Second Law lab revision and error analysis. Unit Test on Monday, December 10th. All tests are cumulative. |

#### How well do you understand Newton's Second Law? How do you do more Newton's Law problems?

2: T 12/4, 5: T 12/4, 7: T 12/4QUIZ Today on simple Newton's Second Law problems, including elevator and friction.After the quiz, we'll do some catch up on problems you have not yet completed. If you have already completed all of the assigned problems, then work on some more problems from chapter 4 in the textbook. (Only problems without trig will be tested.) Homework: Finish all assigned problems from the unit. |

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