Analyse a graph in physics using y = mx + c | A-Level Physics How To

In physics practical work we frequently plot straight line graphs that we use to calculate an unknown quantity. But how is the graph used to determine the quantities of interest? In this video I explain how to compare the experiment's equation to y = mx + c so that we can relate the graph's gradient and y-intercept to unknown quantities. I then demonstrate the method by analysing three real equations and graphs:
1. v² = 2gh
2. R = ρL/A
3. p = Wq/Mg + 0.2R/M
You can download the worksheet I used in this video here: physicshq.wixs...
In the follow up video [ • Analyse log graphs in ... ] I demonstrate the procedure for log graphs / equations.
Relevant concepts: physics graphs, gradient, y-intercept, equation, algebra, straight line, graphical analysis

[@aponsheikh7982]

Thanks buddy.i am from Bangladesh. I love your class.

[@reemamin1584]

you are the best , you saved me life

[@PhysicsHQ]

Thanks. All the best

[@sijibomiokunlola863]

I love your video sir😊. Explanation, simple. Sir the intercept being zero means that the graph has no intercept?😶

[@PhysicsHQ]

Thanks so much.
Yes that is correct RE the intercept.

[@faryal06]

Thanks a lot. Great help!

[@PhysicsHQ]

You're welcome! All the best

[@paultibi588]

Helped a lot
Big time

[@PhysicsHQ]

Great! Thanks for sharing that. All the best.

[@-PutriVinaAmalia]

Your answers really make my day ❤️ thx u!!!!

[@PhysicsHQ]

You’re welcome 🙏
All the best for your studies.

[@alinjoya8984]

Well explaint

[@PhysicsHQ]

Thanks!! All the best

[@franisthebest1234]

thank you so much this really helped !!

[@PhysicsHQ]

Glad it helped! All the best with your studies.

[@a.kcareerinstitute6309]

Great Sir

[@PhysicsHQ]

Hi. You sent another message that seems to have got lost by UA-cam. If you want to get in touch with me ping me an email at [e-mail]

[@suryanshsingh5568]

Nice explanation dear

[@PhysicsHQ]

Thank you 🙏
All the best with your studies.

[@yasminkhalifa8709]

thank you very much

[@PhysicsHQ]

You are very welcome 🙏
All the best

[@kylemedina6700]

Amazing video.

[@PhysicsHQ]

Thanks! All the best with your studies.

[@covrrsyke5538]

Thanks 🙏

[@PhysicsHQ]

You’re welcome 😊 All the best with your studies.

[@kayodeomotayo1056]

What if we aren't given the graph before we are told to linearize

[@PhysicsHQ]

If you aren’t given a graph you’ll need to decide what needs to go on the axes and work from there using the method I demonstrated. It may be necessary to do some algebraic manipulation first - e.g. deriving log equation for a complex relationship but that goes before graphical analysis so it’s related but outside scope of this particular video.
You may find this helpful: How to analyse log graphs in physics | ua-cam.com/video/u1S4n69-1Tg/v-deo.html

[@Amaan_Shafi]

Please tell me how to find "C" ?

[@PhysicsHQ]

If the graph has no visible y-intercept then c is calculated:
c = y₁ - mx₁
Where y₁ and x₁ are the coordinates used in gradient calculation.

[@Amaan_Shafi]

@@PhysicsHQ I am thankful to you 😊 from India 😁

[@a.kcareerinstitute6309]

I will like to have google meeting with u so i can learn teaching methadology from u..

[@aponsheikh7982]

But sound quality is not much better.you have to improve your sound quality.

[@PhysicsHQ]

Sorry for poor audio. Will look into ways to capture higher quality audio.

[@aponsheikh7982]

@@PhysicsHQ ok thanks.

[@PhysicsHQ]

What’s your opinion of sound quality for this video:
Problem Solving Physics - Quantum Physics, Photons 1
ua-cam.com/video/KxSurSJw1J8/v-deo.html