EASIEST question on the International Physics Olympiad?

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2 жыл бұрын

International Physics Olympiad, IpHo Question Solution from 2021 in Lithuania!
Question: s3.eu-central-1.amazonaws.com...
Mark Scheme: s3.eu-central-1.amazonaws.com...
This problem would be very useful for physics olympiads and also preparation for exams such as the JEE Advanced and other university entrance exams.

Пікірлер: 33

@zhelyo_physics 2 жыл бұрын

Right, was that easy? : )

@alellisande9758 2 жыл бұрын

😬

@anonymous99923 2 жыл бұрын

Hi Sir, I'm just curious, which country are you from?

@zhelyo_physics 2 жыл бұрын

Sure! I am Bulgarian, but I have been living in the UK for a long time.

@goodtimes5135 2 жыл бұрын

Yes, but I did the end slightly different. I used the formula for the kinetic energy and rearranged to give the velocity. Then I used mv=h/2L and rearranged to get v, then set that equal to the rearranged kinetic energy equation.

@zhelyo_physics 2 жыл бұрын

@@goodtimes5135 well done! Check out the rest of the question if you want a challenge!

@eigenfeynman9890 Жыл бұрын

for a physics major who has taken quantum mechanics. Yes, these are the problem that comes in class tests

@zhelyo_physics Жыл бұрын

Thanks for your comment!

@siddharthjaswal4954 Жыл бұрын

Preparing for JEE ADVANCED ! Glad to solve it on my own :))

@zhelyo_physics Жыл бұрын

Fantastic! Well done and good luck in preparation!

@ayanagarwaliitdelhi7662 10 ай бұрын

I am preparing to create Fomo and am glad I am successful in it.

@37t73 2 жыл бұрын

hi sir, would you recommend memorizing definitions, since the teacher requires us to do so but i find it tedious

@zhelyo_physics 2 жыл бұрын

For A Level GCSE, it is worth remembering them but only remembering through understanding what happens. E.g. superposition being remembered in terms of the displacement being added for instance. Rogue memorisation I find just doesn't work.

@two697 2 жыл бұрын

It's only worth memorising things that come up frequently and can't be easily derived

@37t73 2 жыл бұрын

@@zhelyo_physics thanks for the reply!

@zhelyo_physics 2 жыл бұрын

Anytime!

@Pedro-cp8zf 2 жыл бұрын

A really nice idea for a next video would be to derive the electromagnetic wave equation from the Maxwell's equations, and also from there show that the Maxwell's equations are also relativistic, even that Maxwell and the other scientists did not know about it until the 1910s

@zhelyo_physics 2 жыл бұрын

Thanks a lot! I actually had a very similar idea so will definitely put it into practice. Thinking of doing an EM marathon too, with a full course of Electromagnetism in one year, from Coloumb's Law all the way up to Maxwell's differential equations in grad. form.

@Pedro-cp8zf 2 жыл бұрын

@@zhelyo_physics it would be really helpful and fun!

@Pedro-cp8zf 2 жыл бұрын

The reformulation in physics that was possible after the Maxwell's equations is something incredible

@wasifahmed6675 2 жыл бұрын

Hi Sir! I'm a huge fan of this channel and have been following for quite a while now. I wanted to ask that what are some of the best books to prepare for IPHO? And books that emphasize a lot on scientific reasoning

@zhelyo_physics 2 жыл бұрын

Thanks a lot! Much appreciated,funnily enough I have a video prepared just on this topic, hoping to release it in a few days!

@wasifahmed6675 2 жыл бұрын

@@zhelyo_physics looking forward sir! Thanks a lot! Take care

@zhelyo_physics 2 жыл бұрын

@@wasifahmed6675 no problem!

@mayur2742 2 жыл бұрын

Sir, I want to ask a question , ..........about potential energy so as we know that gravitational potential at a point is the work done or the amount of work needed to move unit mass from infinity to that point so means if a point is near to the planet or the mass which is creating the gravitational field then you need to work more to move a unit mass from infinity to that point so this means potential energy near the planet is more than that of a point away from planet but in reality we consider the inverse of this statement that a point away from the planet has more potential energy than that point which is near .But in doing so we are considering that negative work is less than the positive work and this is not true.Also, then we are considering a EARTH the reference frame ,not infinity........... HELP

@zhelyo_physics 2 жыл бұрын

Excellent question! I actually have a video essentially answering this. It's all about a common misconception on negative numbers. Have a look! kzfaq.info/get/bejne/Y55oipWF0MyuYXk.html

@mustafa_rayli Жыл бұрын

Sir why can't we use E=hv instead of E=p^2/2m

@zhelyo_physics Жыл бұрын

They would be equivalent and you would get the same result. Just in general, keep in mind that the expressions for momentum for a massless and massive particle will be different. Hope this helps! : )

@user-xn6jt6qu8m 4 ай бұрын

I just used schrodinger equation to solve it

@zhelyo_physics 4 ай бұрын

amazing!

@zarififtekhar 2 жыл бұрын

Bonjour monsieur, are your contents the same regardless of the examboard? or are there some differences? can a Cambridge student watch all of your courses?

@zhelyo_physics 2 жыл бұрын

Hi there are some differences but around 90% of the material is the same. The best thing to do would be to google your syllabus and then tick off parts that you have revised. This way you'd be in control of your learning.

@zarififtekhar 2 жыл бұрын

@@zhelyo_physics thank you so much!