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🟢 8: W 11/26 - friction on inclined plane
🟢 8: W 11/26 - friction on inclined plane
W 11/26 Half Day
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: None. 🦃🍗 Happy Thanksgiving! 🍗🦃
Quiz on friction and static equilibrium & 2-D vector forces Tuesday, December 2nd.
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.
🟩 8: M 12/1 - 📖 inclined plane problems
🟩 8: M 12/1 - 📖 inclined plane problems
Today, we'll apply what you've learned about inclined planes to problem solving.
Homework: Quiz on friction, static equilibrium & 2-D vector forces Tuesday, December 2nd. 📖 Finish any inclined plane problems that you did not finish in class. Unit Assessment on Dynamics in Two Dimensions on Friday, December 6th!
Optional Extra Practice: Optionally try 📖 textbook Ch 5 - inclined plane problems: 24, 25, 28*, 30*, 65, 77, (* need to look at coefficient of friction table) and optionally for a challenge #MQ22, MC30, 63, 83 which require you to put multiple ideas together. If you are having any trouble, re-watch my Inclined Plane video. Do page 6 of the Newton's Second Law packet (skip 3c). You may check Solutions to Inclined Plane Problems, but try them on your own first!
💚 8: T 12/2 - friction & vector forces
💚 8: T 12/2 - friction & vector forces
Quiz on friction and static equilibrium & 2-D vector forces 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. Write one theoretical solution for #1-3 and another for #4-5. What I mean by theoretical solution is to find an expression for acceleration a in terms of given variables: mass m, force applied FA, coefficient of kinetic friction μk , and gravitation field constant g. Watch the video for assistance.
Then, we'll have some time to look at the friction and angled forces problems.
Homework: Finish Friction & Vector Forces (SOLUTIONS). Unit Assessment on Dynamics in Two Dimensions on Friday, December 5th!
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