Hope this video is useful! In the run up to the PAT I will be running live preparation classes. If interested, join in here: zphysicslessons.net/physics-tutoring
@certifiedmenace2244
5 күн бұрын
Question 22 is wrong, the total energy is simply half the potential energy. When you then find the difference you get 1/12 * GMm/Re.
@zhelyo_physics
5 күн бұрын
thanks for the spot, I’ve had a look at the final line and there is an algebraic mistake on the very final line. Otherwise we’d get the same answer as negative 1/12 GMm/Re. Total energy being half the potential energy is much simpler way of getting it though! : )
@certifiedmenace2244
5 күн бұрын
@@zhelyo_physics No worries, glad to help :)
@lw6421
2 ай бұрын
For the ship question would the total vertical distance be 4A because the ship has to go up to the highest point (A), come down (A), go to the lowest point (A) and then come back up (A). or is it just 2A because that’s the distance from the highest to the lowest point?
@zhelyo_physics
2 ай бұрын
correct! : )
@lw6421
2 ай бұрын
thank you :)
@FizOlimp
2 ай бұрын
My brain exploded when I saw the 'Circular Motion Question'. Not because it'd be hard, but because I solved half of a similar problem of the Finals of the 73. National Polish Physics Olympiad. In addition I had come up the idea a few months before the Finals, so it was incredible feeling. What is more, even barely nobody had used calculus, I thought I should've explain my concept of inertia energy (kinetic energy needed not to stay behind with ratating system?) using analogy with string energy.
@zhelyo_physics
2 ай бұрын
Such a great question! My instinct was to assume omega is constant with respect to time but then you realize the moment if inertia changes with time. Thanks for the comment!
@Arnav1883
2 ай бұрын
Please make a video on which books you recommened to solve for olympiad prep.(I know you recommend HKR but its very basic, so some advance level book recommendations would help)
@zhelyo_physics
2 ай бұрын
for mechanics - intro to classical mechanics : ) by Morrin
@sv360_
2 ай бұрын
thanks for the video sir can you do one on the new ESAT entrance exam for cambridge and imperial that is used from engineering?
@zhelyo_physics
2 ай бұрын
Coming up over the summer as well! They now have a sample exam on the cambridge website by the way, some very good questions on there.
@sv360_
2 ай бұрын
@@zhelyo_physics ok thank you sir!
@zhelyo_physics
2 ай бұрын
@@sv360_ anytime!
@certifiedmenace2244
3 күн бұрын
Which PAT is question 16 from?
@Deepthinker4617
2 ай бұрын
Sir, I have a doubt that has given me a headache. Sir, the non-linear dynamics and chaotic systems physicists talk about, these are higher level physics and maths concepts, right? I am in 11th grade; are we taught these concepts or not, or are we only taught about simple systems with some assumptions so that the system does not become chaotic, like assuming friction is not present or gravity is constant everywhere? Am I correct, sir?
@zhelyo_physics
2 ай бұрын
excellent question! They are the most interesting ones!! Generally you have to solve non-linear differential equations for this via tricks if analytical solutions exist or you use numerical method. Have a look at how interesting projectile motion becomes with air resistance here: kzitem.info/news/bejne/moGs042ffKKLdYo
@Deepthinker4617
2 ай бұрын
@@zhelyo_physics What is that 😂😂💀 I am in 11th dude and preparing for jee advanced and you have sent me University level question video 🗿. It means that the problems we deal with are non chaotic and predictable under some assumptions ? Please reply brother 🙏 Like when I get an equation like x=t²-4t+5 And we have to differentiate it .
@liza.56
2 ай бұрын
Sir plsss one for an edexcel international😭i have exam on october
@joe.h-7322
8 күн бұрын
What’s the answer to the last part of question 16 on the significance of the unused solution?
@zhelyo_physics
5 күн бұрын
excellent question, so I think there are only factor that can offer two solutions is that the net force on -q will be different if the two charges were of opposite sign rather than the same (i.e. the two on the side). The other solution must be for this case. I definitely recommend checking over the algebra though, to see if it checks out.
@certifiedmenace2244
3 күн бұрын
@@zhelyo_physicsthe positive solution says that even if Q2 is larger than Q1 then q will be closer to Q1 how can this be?
@세종대왕-x8p
2 ай бұрын
can u do esat guide like this too?😊
@zhelyo_physics
2 ай бұрын
Currently working on it, a lot of the theory will be applicable as well : ) stay tuned this summer!
@세종대왕-x8p
2 ай бұрын
@@zhelyo_physics thank you so much, I honestly find you to be the most useful Physics KZitem channel in terms of high school academics. But I hope it could be pretty soon, as I got my exams in approximately 3 months haha. Appreciate your work!
@sakhamurithanmai4442
2 ай бұрын
sir i have a strong passion to do tough physics problems and on physics itself but i am a student from an indian college who took computer science as a degree but i want to crack international physics olympiad is it worth investing my time on this exam or i just have to focus on subjects of my degree
@zhelyo_physics
2 ай бұрын
mmm I think the problems are great for your understanding but I'm pretty sure the Olympiad is for high school physics students only. Knowing how to invest your time is tricky though, if you are considering a switch to a physics degree I recommend it.
@sakhamurithanmai4442
2 ай бұрын
@@zhelyo_physics I have checked all the eligibility criteria sir my age is still 17 and I still have two years of time for exam before I loose eligibility
@user-fh5sh6bt7d
18 күн бұрын
@@sakhamurithanmai4442 No you need to be a high school student, the age is a separate criteria even if you were 5 years old while being in university you still wouldn't be eligible for Olympiads.
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