end MP1
Today, we'll have an opportunity to practice some 2-D dynamics problems. This is the perfect opportunity to ask questions before the next quiz.
Homework: Work on some of these new problems. ❗Quiz on static equilibrium and 2-D vector forces Tuesday, November 10th.
Optional Extra Practice: 📖 textbook chapter 5 #1-4, 7, 10, 34, 75 also available in Mastering Physics so you can check your answers.
Quiz on static equilibrium and 2-D vector forces TODAY!
Today, 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 talk about what factors affect the motion of an object on an inclined plane theoretically and in real life.
If you missed today's lesson or you need to review some, watch the following video.
Homework: Review your notes and come up with a strategy for the lab that was introduced today. Know how you will perform an experiment to find the coefficient of static friction on an inclined plane.
Today, we'll work on an inclined plane investigation where we look at what happens when there is friction on the inclined plane. Using the materials provided (whiteboard, block, and protractor), you can either choose to calculate the coefficient of static friction or kinetic friction on a given incline. Write your lab in your lab notebook. It should include the following items:
a brief one-sentence explanation of your procedure
a good free body diagram
calculations for μ
a secondary experiment to verify your results (using an additional piece of equipment)
Homework: If you are still confused about how inclined planes work, you may watch my detailed problem-solving video.
OPTIONAL ENRICHMENT (for those thinking of taking AT Physics especially):
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. Try these 📖textbook inclined plane pulley problems #MQ22, MC30, 63, 83.