A Level Physics Teachers Take On Olympiad Questions
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- čas přidán 25. 02. 2024
- Can the combined might of Zhelyo (ZPhysics) and Lewis (Physics Online) answer some of these challenging BPhO questions?
Thanks for watching,
Lewis
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Come on guys it's not rocket science
😂😂😂
Jail
😂😂😂😂😂😂 lol
Rocket science itself isn't Rocket science
Lol
u people are so effective like i was doing just integrals in the first problem it got really messy 😅
learned something new, thank you!
Gladly in the first question the variation of g with altitude wasn't considered
that'd be a cool problem. I might do that as a separate video, thanks for the idea!
I was thinking the exact same thing 😅
Haven't calculated the answer yet myself and haven't reached the answer in the video either, but the time it takes should be short enough that the change in g would be negligable considering even on the ISS the gravitational acceleration is still around 90% of what it is at the surface.
EDIT: Guess I was wrong with my guess of the time.
@Dalroc well, considering that every gram of payload costs a lot of money, i'm sure companies like spacex take this factor into their calculations. After all, if g gets weaker with altitude, less fuel is needed.
Great content. One thing that I always struggle with is now each word in the description counts e.g. "smooth bowl" means there is no friction between the rod and the bowl. "Fixed on the table" means that the bowl does not rotate.
In the last question you can solve by minimizing potential energy pretty quickly, solving for theta given r,l and then inverse the expression to find the radius.
This is giving me flashbacks of the R1 paper last year.
bigger crossover than avengers endgame
Didnt expect zphysics here :)
where can we get this question paper?
Great video!,
I think in (h) (iii) you should put the clause 0
Did someone say Olympiad Problems? Let's goo! : )
hello, what would you recommend me which AP physics class (should i take) is paramount to get in to top 10uni in the world. like harvard, mit , oxbridge
I'd recommend AP Calculus and AP Physics, the calculus based course. I'd also focus on learning as much physics as possible, you can have a fantastic undergraduate degree at so many universities and be extremely successful. You got this, good luck!@@EdisonvsTesla
@@zhelyo_physics i appriciate it.
Let's goooo!
Do you guys solving live or you have practiced before shoot ? I am really stunned by problem solving
Thanks! We practiced, although it might be fun to attempt an Olympiad without practice. It'd definitely be a long long video filled with lots of thinking. Stay tuned! : )
what exactly does putting the t_0 in the first problem of the video do? because i was initially only going to put t when you first read out the question
Can people travelling through space to a distant star system at a known speed calculate the time on earth given only the time the journey started, the current recorded time, and a history v(t)?
Pity that so few actual physics concepts are tested in these questions. It seems to be mostly mathematics. The physics is done in a couple of lines.
Thats how physics works
Mathematics is the language of physics. It usually works this way.
Physics is mathematics:)
@@bluefirephoenix397 The AP Physics exam bro 💀
@@firefx963 idk what that is I'm only grade 12 (STEM student) 💀
hey i noticed an error in the working of the sine rule at 25.34, if you key in the equation into the calculator, "math error" is obtained. i believe you meant A= sin^-1(49.17sin(124.8)/89.67)
At 18:07 i thought that the cosine rule was a^2 = b^2 + c^2-2bc x cos(A not -bc?
You're right, my mistake. In writing this down as we filmed this part of the video (I think I was just too excited with the problem) I forgot to write in the 2 - but the calculated value is correct.
Don't u need to integration in first part bcz of variable mass fuel mass is varied u also need to that thing in account
Please mention what standard this olympiad applied
also make video on INPHO, it will be interesting
how do u get the calculator to show u the history of calculations at 14:14?
Press arrow up
I know its gonna be hell easy but bring a video of you attempting an EASA Part 66 module 2 physics exam ( Physics exam for Aircraft maintenance engineers) non calculator
For the last problem, we could have used Lami's theorem as only three forces were acting, isn't?
It's kind of virtual work problem.
Is there a reason you can't just use component form vectors and an x,y coordinate plane in j) ii?
Regarding problem (h) (ii), why do you set the overall force to ma, as opposed to ma + v(dm/dt)?
Well Newton's 2nd law of motion says that:
F=ma
And F refers to the sum of all forces exerted on the object.
@@abderrahmanekharfi8489 F = ma assumes a constant mass. Really, F = dp/dt, where p is momentum (classically, and non relativistically, p = mv, and if m is constant then dp/dt = ma).
This topic is covered under centre of mass in India and is covered in class 11 for jee advanced and mains...these questions are nomal class problem while preparing for jee
Hey can you review JEE advanced 2016 It would be amazing
thats a good idea, but isn't JEE a mix of chemistry maths and physics?
is the cosine rule not wrong? I thought it was c = sqrt(a^2 + b^2 - 2abcos(theta))
Yes, I made a mistake writing it down because I was so excited by this question - but the answer is correct!
44:22 if you would had taken axis for torque calculation at the point were the 2nd normal reaction is passing from then you would have taken 6,7 steps less as compared to what u had done
Well your solutions are preety good
Edit:- please ignore my English its not good sorry for that
oh great to know, I might redo it, thanks for letting me know!
The last question can also be solved in terms of potential energy:
Using Thales‘ theorem, we find that we can write the potential energy as a function of theta under boundary condition that the rod touches the bowl:
V(theta) = (l/2 - 2r cos(theta)) sin(theta) mg
Compute the derivative and set it equal to 0 (i.e. we are at the potential minimum and therefore in equilibrium), apply the cosine Addition Theorem, and you quickly find the same result as in the video.
And then there's me who still struggles how to rearrange equations in GCSE physics
Yooooo the collabbb
I like to form attachments
Hey, chemist here. Yes, the fuel is combusted 😬👍
The first rocket mass ques is in our 11th book for JEE preparation ☠️
Edit:- not exactly same but the concept is same.
Yea the whole thrust concept and derived formula is covered in NLM
Being a student of 11th grade in INDIA i can say this has been taught us this year cool man 😮
jee
Yes in JEE centre of mass…variable mass system
@@dhruvacharya2602 it was really hard to understand but here i learned a better approach to those com questions
Well jee student have almost same knowledge as mit 2nd year student who is just opting physics as minor
@@Ayush-yj5qvreally though? The quality of education and infrastructure of mit is vastly superior compared to iit
Attempt apho and inpho problems also.
25:05 I think you have to replace the b with c and the B with C, not a with c and B with C. Actually calculating what you wrote down gives an error as the input to the inverse sine function comes out to be approximately 1.41 which is greater than 1.
Variable mass?
F= vdm/dt + mdv/dt? , from momentum thing,
Yes. But dv/dt is 0 because velocity of exiting fuel is constant in the rocket reference frame which essentially boils down to what was done in the video.
Please Try the jee advanced 2016 physics paper
I think for the first question it is v*dm/dt which gives the same answer though.
hmm, thats if you consider the rate of change to be inconsistent with respect to time. Else, u could use this equation, and find a relation between the rate of change of mass with time at any instant and then solve the question. Since the fuel velocity is constant, d(mv)/dt, would just yield dm/dt*v using product rule and then use delta instead of del for thisequation since dm is consistent with time.
What level of students are these questions meant for?
These are for A Level Physics students
Ive never learned this stuff and it looks so insanely hard to solve.
It is.
In INDIA 11th grader use to solve these type of question while prep of IIT-JEE ( world 2nd toughest exam)
Yes bro , first question is of variable mass which is taught inNLM in 11th
Bruh, these ones are easier.
🤣🤣🤣
as a JEE aspirant, JEE Questions are 0.1% of Olympiad Questions.
If what you are saying is correct, why hasnt India consistently achieved first rank in IMO, IPhO, IChO?
Quite simple actually because Indian students have to handle all three subjects physics chem and math while preparing for iit jee which is what most students who choose science do and hence can’t go all in for one subject and the math in imo is completely different than in jee but still many Indians do well in olympiads and a lot of the times the top rankers have gold medals in some olympiad
kuch bhi mat bolo bhai olympiad level problems jee advanced me 1% aati hai
could you guys tackle the recent board paper in india, a year of prep and even i got my ass handed to me
thanks for the video keep up th good work xoxo from india
bhai mene suna JEE ke questions diye
@@srveer2883Ha mains ke kuch questions the. Ek case based study ka question tha wave optics ka Jo BSC 2nd year ki book se aya hua ha 💀
Mene zyada pdha nhi tha saal bhar, last ke 15 days ma hi pdha tha isliye zyada kuch nhi bolunga, but difficult to tha.
Literally how in the hell 🤣
Helppppp... at 6:50 they say when t=0 m0 should be as big as possible.... when t=0 shouldnt m0 be as SMALL as possible cuz no fuel will have been lost, because the rocket will be heaviest with a full tank????
T=0 means weight of fuel+ rockets weight..as no fuel is lost at t=0..the mass will be maximum
And the mass decrease as time increases bcz of loss of fuel
A whole bunch of papers
First one is solved using variable mass system
Yes :)
❤❤❤❤❤❤❤
i felt so good knowing i could solve the first part of the problem being a higschooler but the rest is ah
I think you missed the 2 in (a^2 = b^2 + c^2 - b*c*cosA), it will be (a^2 = b^2 + c^2 - 2*b*c*cosA) but answer is write.
Please explain why Olympiad problems are better than textbook problems?
I have so much fun solving them. They typically involve original solutions or thinking which are not commonly found in textbooks. The answers often deduce to showcase beautiful relationships. I also think they are more applicable to physics at university.
india wale log please ajeeb comments mat karna yaar obviously ye sir logo ko bahut ache problems bhi solve karne aate hai but olympiad ke problems bas aisehi solve karrahe hai, so lets be decent and enjoy the video without bragging like clowns
I like physic because of my teacher but I get bad grades even with study but doesn't stop me 😆
Try BDPhO questions
The only thing I know is the Algebra part 🤣
Hi sir I am from Bangladesh 🇧🇩🇧🇩🇧🇩
Hello from England!
Why isn't deltaP=m*deltaV+V*deltaM ?
cosine law: a^2=b^2 + c^2 - 2cb(cosA), you guys in your infinite wisdom got this wrong!
Solve IIT JEE ADVANCE 2016 Physics questions. Most difficult paper in history of iit jee.
zphysics has alr made a video on that question
🤣🤣🤣
as a JEE aspirant, JEE Questions are 0.1% of Olympiad Questions.
If what you are saying is correct, why hasnt India consistently achieved first rank in IMO, IPhO, IChO?
React to jee advanced exam 2022
zphysics has alr done the hardest question in the JEE 2016 paper
love to see john cena teaching physics
Medical ballerinas
Why your one hand look bigger , like one of the armwrestler
Mah that first question is piss if you do further maths mechanics, sometimes I help my friends who do a level physics justcuz they dont understand rates
so so real which specification re u on im on cie
What olympiad is this? The firdt problem is not even of JEE Advanced level.
Bro there are some easy question in jee advance also but 2 and 3 question we somewhat like jee advance.
Not all the Olympiad problems are super complicated - lots are great for all A Level students.
@@kavyapatel9939 ofcourse there is, but I am comparing to the overall level of JEE Advanced
The plane bearing calculation is a simple radar plotting problem. Such accuracy is impractical in the real world as variables such as Half-Convergency correction of bearings hasn't been considered. The answer could be found in less than a minute using a ruler, a protractor and a good old fashioned compass. You don't need to take 10 minutes to work out where something is in 10 minutes time, there is no point.
This one took a while to explain - but I agree that if you took that long to find out where the plane was it would already have changed position again!
Mr Grumpy
that's not the point of the exam, it's an exam testing for physics understanding. The problems are simply there to make you apply physics concepts. They aren't testing your radar plotting skills. The ones giving these tests will go out and build the mechanics of aviation so they must have the physical understanding of its working. The same clarity isn't necessary for a pilot on board.
@@supersomething3979 The exam poser should therefore consider the context of the question. I have had numerous Cadets come on board a vessel and try and apply what they have been taught in teaching establishments how to compare the theoretical Azimuth of a celestial body against an observed optical gyro bearing of the body to derive the "Gyro Error" but the cadets were completely ignorant of the fact they were measuring the optical bearing from an unstable vessel in a seaway using an instrument that at best, on a calm day in port, could measure the accuracy within ½°. And yet they would record the error to three decimal points!
me watching while cant even pass foundation gcse science 😂
How
This is toooo easy lol XD i thought it would be harder than JEE advanced
This is not even close to jee
In India which was been taught in our 9th grade ( 13yrs).😅😅
Stop the bs. Im in iit and solved these. And we learnt it 11th and 12th 🤦♀
@@annepusaidevesh u dont know what the education is like in the area he lives in? Maybe he is in an accelerated program?
not flaunting just check our 11th grade physics part 1 book is named ncert grade 11 physics
@@jasonkim9654
@@jasonkim9654Dude it's not flaunting..in India we have to go through that trauma in high school which u guys get in college
@@justanotherguy625cry about it then, the education system is screwed in india
Here in India we study this at 15-16 age avg high schooler can solve
this topics are in our syllabus but an avg high schooler cant solve this...this questions are like the actual tough question of jee advanced
🤣🤣🤣
as a JEE aspirant, JEE Questions are 0.1% of Olympiad Questions.
If what you are saying is correct, why hasnt India consistently achieved first rank in IMO, IPhO, IChO?
@@obamabinladen2206 teta nam bohot acha hai bhai i like it
0.1 percent na bol...20 to 25 % bol sakte ho...jee walo ko 3 subject hi ache se parna padta hai wo bhi to socho
@@apurbadutta867 see IPhO, IChO, IMO problems
Meanwhile Indian elementary students learning how to create a nuclear bomb:
kya karraha bhai clownery ye sab mat kar yar
ye log nahi sudhrenge
Har jagah bakchodi karte rehte hai@@SpirituALLITYKING213
🤣🤣🤣
as a JEE aspirant, JEE Questions are 0.1% of Olympiad Questions.
If what you are saying is correct, why hasnt India consistently achieved first rank in IMO, IPhO, IChO?
@@obamabinladen2206 my comment is just a joke about the Indian always yap about how hard their education system is whenever there is a video about education. (i’m not an Indian btw so i can’t answer your question)
so not the person you replied to, BUT, you exaggerated a bit with the percent part they each have some very excellent conceptual questions and he is just some guy who doesnt even studies and just likes to take pride on other peoples achievments or hype @@obamabinladen2206
Come on you can't beat IIT-😊JEE
🤣🤣🤣
as a JEE aspirant, JEE Questions are 0.1% of Olympiad Questions.
If what you are saying is correct, why hasnt India consistently achieved first rank in IMO, IPhO, IChO?
@@obamabinladen2206 IIT's bro
Jee aspirants laughing at a corner 😂
Corner ki hi aukat hai
🤣🤣🤣
as a JEE aspirant, JEE Questions are 0.1% of Olympiad Questions.
If what you are saying is correct, why hasnt India consistently achieved first rank in IMO, IPhO, IChO?
@@obamabinladen2206 we used to study specific things only 😂 being in iit i can say that 😂😂 u are saying such a way like you have cleared Olympiad go kid don't argue here
@@kavypatel007 I have cleared Olympiad 😂😂😂
You cleared IIT and still are Comment Warrior 😂😂😂
@@kavypatel007 bina google kiye Kiepert Hyperbola batao phir maan jaaunga mein 😂😂
Dual Desargues Involution Theorem ka naam bhi suna hai?
Olympiad me ye aata hai, JEE uska 0.0000001% bhi nahi 😂😂
@@obamabinladen2206 jee me basic quadratic equations aata h wo bhi tumse ni banega 😂😂
Come on guys it's not music theory
Boaro?
Many of Class 11 students in India can do better😂
🤣🤣🤣
as a JEE aspirant, JEE Questions are 0.1% of Olympiad Questions.
If what you are saying is correct, why hasnt India consistently achieved first rank in IMO, IPhO, IChO?
Dude Thats a Normal NCERT Indian CBSE Question... lol
Try jee advanced 2022 and also try jee advanced 2024 when its happens because students have to solve Olympiad level math , chemistry, physics in three hours
🤣🤣🤣
as a JEE aspirant, JEE Questions are 0.1% of Olympiad Questions.
If what you are saying is correct, why hasnt India consistently achieved first rank in IMO, IPhO, IChO?
@@obamabinladen2206 chill bro you go and solve cbse 2024 physics paper
@@AlphaVoid-gx7lq try one IPhO question. Even Understand it.
if a cannon ball is shot from the ground at a intial velocity of 210m/s, with the force of gravity affecting it, how long will it take for it to come back down and hit the ground after being shot up?
Incomplete question bro ... u didn't mentioned any angle or whether it is upward
@@saikrupabehera8661 bro i said for it to come back down and hit it, obviously that means it goes straight upwards at 90 degrees...
Hahaha have you tried jee advanced one 😏
🤣🤣🤣
as a JEE aspirant, JEE Questions are 0.1% of Olympiad Questions.
If what you are saying is correct, why hasnt India consistently achieved first rank in IMO, IPhO, IChO?
Writing Cos∅² instead of cos²∅ is painfully
These qns were easy for me. 🥲
And I'm a NEET aspirant!