The Physics of Inclined Planes

Mr. H discusses the physics of objects moving along inclined planes. The identification of the forces, the drawing of a free-body diagram, the components of gravity, and the application of Newton's second law to the analysis are discussed in an organized and understandable manner.
You can find more information that supports this video on our website:
Lesson Notes:
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Slides:
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Teacher Resources
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Student Action Plan includes:
Concept Builders: Free-Body Diagrams for Inclined Planes:
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Concept Builders: Solve It! with Inclined Planes:
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Minds On Physics, Mission F2D5 - Inclined Planes - Free Body Diagrams
Minds On Physics, Mission F2D6 - Inclined Plane Analysis
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Tutorial on Forces in Two Dimensions, Lesson 3, Inclined Planes
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Other Videos on Forces in Two Dimensions can be found at ...
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[@MoonAmur]

Hey Im a little concerned! At the very end of the lesson you're supposed to divide the net force which is 5 by the mass which is 3.45. So in my calculator I typed 5/3.45 and got 1.45 m/s^2

[@PhysicsclassroomVideos]

Yes. Ouch. I don't know where the 3.20 m/s/s came from? Thats a mistake 😕. The 5.0 N and 3.45 kg are correct but the final calculation of acceleration is incorrect. Thanks for the heads up.

[@MoonAmur]

@@PhysicsclassroomVideos Thank you so much! I'm helping my husband study for a test and needed a refresher on some physics concepts. Your video was very helpful!

[@imlily1309]

Thank you very much! I have an exam tomorrow and it really helped me out in understanding all the variables involved!

[@TharukSeneviratne]

thank you.

[@bellajeetsahota55]

u rule!

[@User79990]

You helped me so much Thankyou!!!

[@PhysicsclassroomVideos]

Happy to help!

[@dondoodler8851]

the king of clear explanations! thank you

[@PhysicsclassroomVideos]

Thanks for your kind words.

[@dumpster1947]

Great tutorial Thank you very much!

[@giovannip8600]

Super clear, thank you!

[@masterlaughter4924]

Thank YOU!!!!!

[@PhysicsclassroomVideos]

You're welcome.

[@nasimshapouri8609]

you are awsome

[@ko0fpatch573]

Oop there goes gravity

[@salamiabdulganiu9069]

Explanatory, easy to understand and detailed thanks

[@PhysicsclassroomVideos]

Glad it was helpful!

[@ixchel8772]

sooo nice. thanks a lot!!!

[@PhysicsclassroomVideos]

Your welcome.

[@ifiokekott3833]

I love your video it's straight to the point but I don't understand something In 2:34 you introduced an axis y and x, which I get. I also know that sinα is for y and cosα is for x. When solving for y related forces we normally do Wsinα to get Fnorm but here and in the Mechanics textbook they do Fnorm=Wcosα, and Fii=Wsinα why?

[@PhysicsclassroomVideos]

Nope. I've done it identical to your book. Eqns are at 3:40. Sine is for parallel or x and cosine is for perpendicular or y and generally = to Fnorm. Explanation as to why is given seconds earlier.

[@ifiokekott3833]

@@PhysicsclassroomVideos yes that's my question In physics sin is used for the y axis and cos for x axis but here is flipped why, even in textbooks?

[@PhysicsclassroomVideos]

Because the angle Theta is between the weight vector and the y axis. For most other situations the angle Theta is between the vector to be resolved and the x axis.

[@zubairahmed1177]

Hello, When I go to concept builder and try to solve inclined plain problems, there are six places to fill, whereas there are five forces(four in case of no tensile, and 3 in case of no friction), which implies that we will also do the components of gravity, but we can not add the parallel component..so kinda confused.

[@stefi9757]

you look like my spanish teacher but uncuban-ified

[@paulwhittle395]

Really helpful and clear explanations -thank you very much!

[@prodmavvy]

amazing thankyou

[@PhysicsclassroomVideos]

Welcome 😊

[@davendraroyeppen4676]

Sir Please tell me how to work out friction Is there a formula to do this. Thank You

[@PhysicsclassroomVideos]

Addressed beginning on Slide 7.

[@rawsonmadhege6208]

U nailed it