Physics Youtubers VS Physics Olympiad

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‪@PhysicsOnline‬ and ZPhysics take on the British Physics Olympiad Senior Challenge for Year 12.
We have a look at some of the problems on the challenge, how to prepare and tackle the interesting physics problems on mechanics.
Please note these are not official solutions and there could be mistakes or inaccuracies. Please visit the excellent website for the British Physics Olympiad to access the paper here:
www.bpho.org.uk/Papers/SPC/BP...
The mark scheme can be found here:
www.bpho.org.uk/Papers/SPC/BP...
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/ @zhelyo_physics

Пікірлер: 47

@zhelyo_physics 4 ай бұрын

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

@waliveroliver5854 4 ай бұрын

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 4 ай бұрын

Me! Im going for gold!

@zhelyo_physics 4 ай бұрын

Good luck! @@terdooosu7185

@zhelyo_physics 4 ай бұрын

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

@aryaapple1925 4 ай бұрын

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 4 ай бұрын

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

@zhelyo_physics 4 ай бұрын

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

@sh-mk5mk 4 ай бұрын

Excellent video gentlemen

@zhelyo_physics 4 ай бұрын

Thanks for the comment!

@PhysicsOnline 4 ай бұрын

Thank you

@krish-ut9de 5 күн бұрын

you guys look like brothers!!!

@andrewgilday4549 3 ай бұрын

This is excellent!

@zhelyo_physics 3 ай бұрын

thank you very much! Glad you like it!

@rohanhegde3063 4 ай бұрын

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 4 ай бұрын

thank you so much!

@light5115 4 ай бұрын

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 4 ай бұрын

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!!

@YO-BIZZY 4 ай бұрын

if i got cot(θ) = a/g is that calm or not?

@zhelyo_physics 4 ай бұрын

I think you have to use the other angle, the one to the horizontal, check out my longer explanation in another comment. Actually I'll copy it: "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!!"

@YO-BIZZY 4 ай бұрын

@@zhelyo_physics Ohhh I see my error, oops. I flipped one side's fraction (g/a flipped to a/g) but not the other to put cot(θ) into tan(θ) using 1/cot(θ) = tan(θ). Apart from that, I think its good. Thanks, ZP!

@stary3735 4 ай бұрын

How would you be able to do questions 1?

@zhelyo_physics 4 ай бұрын

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 4 ай бұрын

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

@zhelyo_physics 4 ай бұрын

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

@Was12249 4 ай бұрын

So the Senior Challenge is just one paper ?

@zhelyo_physics 4 ай бұрын

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

@milko5143 4 ай бұрын

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 4 ай бұрын

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 4 ай бұрын

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

@harigaming3432 4 ай бұрын

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 4 ай бұрын

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

@harigaming3432 4 ай бұрын

@@zhelyo_physics Thanks @zhelyo_physics

@harigaming3432 4 ай бұрын

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

@zhelyo_physics 4 ай бұрын

thank you so much! @@harigaming3432

@ggxsky4811 4 ай бұрын

Is it round 2

@zhelyo_physics 4 ай бұрын

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: kzfaq.info/get/bejne/i56Sq5pm3MmWiqM.htmlsi=7o5egxDNXaY8DEvb