Physics Teachers VS British Physics Olympiad Senior Challenge

[@zhelyo_physics]

So who is taking the Senior Physics Challenge next week??

[@waliveroliver5854]

Me. I have had no help from my teacher who signed me up to this without asking me, I'm the only one in my class doing it so you are all the help I've had so thanks!

[@terdooosu7185]

Me! Im going for gold!

[@zhelyo_physics]

Good luck! @@terdooosu7185

[@zhelyo_physics]

Hope this playlist is useful: kzbin.info/aero/PLSygKZqfTjPDsDxdAJUxBOCADr0gl5Hx9&si=UP-OzFXrZLgvdcI8 Also on Lewis's channel you will find the walkthroughs of the 2023 paper. Good luck and enjoy : ) @@waliveroliver5854

[@aryaapple1925]

Sir im in Year 10 but I want to take the senior physics challenge. My teacher would not let me, what do I do?

[@raghavanand9965]

Please make a video solving the NSEP (National Standard Examination in Physics) paper of India. Its got a lot of good problems.

[@zhelyo_physics]

Thank you for the idea, very curious to have a look

[@rohanhegde3063]

Sir I am from INDIA can you do more videos like it will help us also please do even other countries examination problems(really your explanations are too good)

[@zhelyo_physics]

thank you so much!

[@sh-mk5mk]

Excellent video gentlemen

[@zhelyo_physics]

Thanks for the comment!

[@PhysicsOnline]

Thank you

[@light5115]

For the last question, you said tan(x)= h/L, when shouldn’t it be tan (x)=L/h because tan=o/a not a/o?

[@zhelyo_physics]

correct! We didn't spot this. I answered this in a previous comment, let me copy it below: Excellent spot!! We should have considered 90 - theta for the geometric approach as it's the angle between the diagonal line and the horizontal line above if that makes sense (if it doesn't I'll upload a diagram somehow). I actually did this alternatively using forces: mg=Fcosθ (1) ma=Fsinθ (2) From (1) F=mg/cosθ Plug the above into (2) ma=mgsinθ/cosθ a=g tan θ tanθ=a/g (3) Now consider a triangle between the two parts of the U tube, where θ is the angle to the horizontal. tanθ=h/L From (3) a/g=h/L Hope this helps!!

[@krish-ut9de]

you guys look like brothers!!!

[@potion-of-pondering]

the physicist gene is strong (and quite striking too) :3

[@Was12249]

So the Senior Challenge is just one paper ?

[@zhelyo_physics]

yep! : ) It gives a nice introduction to olympiad problems before round 1 the year after.

[@milko5143]

Super video , just one thing, at 22:55 isnt tan∅ opposite/ adjacent so it should be l/h? Or maybe im just visualisng it wrong. But great video from you two legends 👍

[@zhelyo_physics]

Excellent spot!! We should have considered 90 - theta for the geometric approach as it's the angle between the diagonal line and the horizontal line above if that makes sense (if it doesn't I'll upload a diagram somehow). I actually did this alternatively using forces: mg=Fcosθ (1) ma=Fsinθ (2) From (1) F=mg/cosθ Plug the above into (2) ma=mgsinθ/cosθ a=g tan θ tanθ=a/g (3) Now consider a triangle between the two parts of the U tube, where θ is the angle to the horizontal. tanθ=h/L From (3) a/g=h/L Hope this helps!!

[@milko5143]

@@zhelyo_physics ohh super I get it now thanks for explaining clearly 👍

[@andrewgilday4549]

This is excellent!

[@zhelyo_physics]

thank you very much! Glad you like it!

[@stary3735]

How would you be able to do questions 1?

[@zhelyo_physics]

interesting quesiton, so it's a number I actually remember but only because I teach it all the time. If you didn't I think it's best to estimate the density of the Earth (rock is around 5500 kg/m^3) and use denstiy = mass/volume where v=volume of a sphere, you are given the radius of the earth so you should be able to get a good answer. Any other approaches I am missing?

[@stary3735]

@@zhelyo_physics No the mark scheme also has a guestimate. Any final tips for tomorrows challenge?

[@zhelyo_physics]

enjoy the problems! I am actually just about to film a final cool problem I really enjoyed from an old paper. Stay tuned!@@stary3735

[@chubz1568]

Forse diagram

[@harigaming3432]

Bro please do a video on JEE too please its one of the toughest ever entrance tests in India and its physics problems are also good . Give some tips regarding it also please

[@zhelyo_physics]

I love JEE Problems! I have a playlist of problems here kzbin.info/aero/PLSygKZqfTjPAs0IBTO4cXbTdwtQ1fpiX8 . I will see if I can do one on an entire paper which would be very very tricky.

[@harigaming3432]

@@zhelyo_physics Thanks @zhelyo_physics

[@harigaming3432]

​​@@zhelyo_physics Hatsoff to your dedication you reply to every comment and help people

[@zhelyo_physics]

thank you so much! @@harigaming3432

[@ggxsky4811]

Is it round 2

[@zhelyo_physics]

It's the Senior Physics Challenge for Year 12 but the problems are great fun! For round 2 I recommend doing also the harder IPhO problems from this playlist: kzbin.info/www/bejne/i2nFqWprrMhlkNEsi=7o5egxDNXaY8DEvb

[@ibragimshamsiyev_]

Hi

[@zhelyo_physics]

Hello!

[@danielchard3926]

Nah bad

[@varan2412]

2 goats

[@zhelyo_physics]

Thanks 😀

[@MayNazim]

Hey did you sit the senior physics challenge this year?

[@Klaus-Schwab_Dictator]

Nerds