Young Modulus - Required Practical - A-level Physics

[@Goldenblitzer]

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

[@0x1_chips]

Isn’t the equation in the equation booklet u get in the exam though? Good way of remembering it anyway!

[@harrypenrose2949]

@@0x1_chips I imagine some people will struggle to rearrange the equation

[@0x1_chips]

@@harrypenrose2949 tru, u revising for paper 3 tomorrow too?

[@nibber7652]

This fries my head because we did this last week and I was struggling with the graph

[@joemilnes9062]

The symbol is ‘E’ because it’s sometimes referred to do as the engineering modulus I believe

[@henrybullough2822]

No elastic modulud

[@thomasplayzmc2576]

@@henrybullough2822 no engineering modulus

[@robsonishere9062]

@@thomasplayzmc2576 no elastic modulus

[@guesswhoami4723]

JUST AS I WAS STUDYING IT!

[@mrmysterious1724]

i still don't understand how to get those percentage uncertainty

[@georgiag8109]

the uncertainty is just half your resolution divided by the reading you took, and to make it a percentage times it by 100

[@liamfinley723]

@@georgiag8109 you don’t half resolution do you?

[@ninajoyce9906]

@@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

[@parallel4]

@@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

[@Emerson-m3f]

My teacher does it differently to this and I don't know which version to do. Ahhhhh.

[@7490maddie]

Whichever you find easier to understand

[@taasinbinhossainalvi9173]

Skip this one ☝🏼

[@x_nova_x7469]

whats the purpose of the tension bar?

[@zaeemnavid765]

I thought that percentage uncertainty in gradient was best - worst over best and not worst - best over best

[@tomchapman128]

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

[@zaeemnavid765]

@@tomchapman128 ah crap forgot about the modulus, thanks

[@ScienceShorts]

See it done for real: kzbin.info/www/bejne/l3i2kKePgrFmfrM (Obviously that's not me this time...)

[@mdfardinferdous4221]

Fusss.......!!!!????