Young Modulus - Required Practical - A-level Physics
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- čas přidán 5. 07. 2024
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This fries my head because we did this last week and I was struggling with the graph
The symbol is ‘E’ because it’s sometimes referred to do as the engineering modulus I believe
No elastic modulud
@@henrybullough2822 no engineering modulus
@@thomasplayzmc2576 no elastic modulus
See it done for real: czcams.com/video/aGS_tYML3HQ/video.html
(Obviously that's not me this time...)
to help remember the equation, if you want to, E=FL/ax, if you remember flax, its in order and you can cut the equation in half (F/a & L/x) to find both stress and strain formulae
Isn’t the equation in the equation booklet u get in the exam though? Good way of remembering it anyway!
@@0x1_chips I imagine some people will struggle to rearrange the equation
@@harrypenrose2949 tru, u revising for paper 3 tomorrow too?
JUST AS I WAS STUDYING IT!
whats the purpose of the tension bar?
i still don't understand how to get those percentage uncertainty
the uncertainty is just half your resolution divided by the reading you took, and to make it a percentage times it by 100
@@georgiag8109 you don’t half resolution do you?
@@liamfinley723 it depends on whether youre doing a reading or measurement, if its a reading like a temperature then its half the resolution because its been zeroed but if its a measurement its the full resolution because it is the uncertainty either side, i think on this it is the resolution as u have a 0 error and a measurement error, theres loads of good videos on uncertainties - i didnt know how to do them until and hours ago haha exam on thursday
@@ninajoyce9906 good luck mate, also got an exam on thurs lol. And yeah uncertainties aren't hard, you just have to memorise all the rules. But the rules themselves aren't complicated
My teacher does it differently to this and I don't know which version to do. Ahhhhh.
Whichever you find easier to understand
Skip this one ☝🏼
I thought that percentage uncertainty in gradient was best - worst over best and not worst - best over best
You can just take the absolute value: |best - worst| = |worst - best| that way. It's just to make sure you don't get a negative value
@@tomchapman128 ah crap forgot about the modulus, thanks
Fusss.......!!!!????