You NEED to Know These for A Level Physics

[@zhelyo_physics]

Join my Last Minute live Zoom sessions before each paper: zphysicslessons.net/physics-tutoring

[@Jake-ie6bi]

I don’t want to like it because it has 981 likes and 981 is gravity

[@covenantfosu4872]

What a legend this video was exactly what I needed

[@zhelyo_physics]

Thank you for the comment!

[@TanusreeReddy-y2j]

This was super helpful!!! THANK YOU. Please do upload a part 2 if there are any other significant points you may have missed out. THANK YOU AGAIN!!!

[@zhelyo_physics]

Anytime!! Thank you for the comment!!

[@Jesus78981]

I love these as questions

[@klavn5619]

May you be blessed and achieve a blissful success!!!!

[@zhelyo_physics]

thank you so much!

[@Ahmad-al-shanbour-.-]

Soooo useful, thank you very much

[@zhelyo_physics]

anytime, thank you for the comment!

[@inabafatema4606]

thank you so much!!!! was so helpful

[@audiblearena401]

I wanted this before my exams today just exam finished and I see u posting this

[@zhelyo_physics]

Hope the exam went well nevertheless!

[@WhosNiall]

Hey i sit my AS physics paper on wednesday. Feeling really nervous but your videos have helped a ton! Anychance you could make a video on graphs that are important to learn for A level physics? Thanks a ton

[@zhelyo_physics]

thank you so much for the idea! Good luck on Wednesday, you got it!

[@noorshah2038]

Thank you!

[@zhelyo_physics]

Anytime, good luck today!

[@tasniashahreen8537]

Thank you for this

[@zhelyo_physics]

anytime, thanks for the comment!

[@c4ash]

Doing more than my teachers 💀, free of charge too. Hats off to you sir 🫡

[@zhelyo_physics]

thank you so much for the comment! Much appreciated!

[@JakubS]

Love your energy, great video, very informative

[@zhelyo_physics]

Thank you very much!

[@Freepalestinefromisnotreal111]

Can you please go over the gravitational fields questions in ocr a specimen mcq i think its q 15 but it was so hard to launch a rocket from the surface of the Earth into an orbit at a distance of 18000 km above the centre of the Earth. The radius of the Earth is 6400 km and it has mass 6.0  1024 kg. What is the minimum work done to move the 150kg mass of the rocket into this orbit? Answer 7.7x10⁹J

[@zhelyo_physics]

I actually solved this today, I am convinced the mark scheme is wrong this on this one. To find it: find the difference in GPE between the surface and the orbit, that's how much energy you need to bring to that height in the gravitational field. But also in order to fire it to a stable orbit you need to add the required KE at that orbit which would be 1/2mv^2 where v is the orbital speed sqrt(GM/r).

[@niklasli5]

Amazing video, thank you!

[@zhelyo_physics]

anytime, thanks for the comment!

[@SyedghulameTahaBukhari]

07:41. Why wouldn't it be the resultant force and be the average force?

[@ahmedxaziz2960]

Thanks 🙏🏿 plz make more videos like these ss exam is close, you will get lots of views

[@zhelyo_physics]

anytime! Thank you, I really try hard to think of the most useful content I could make : )

[@FaisalSudheer-c2n]

Thankyou this really helps

[@zhelyo_physics]

anytime, thank you for the comment!

[@nickjarv123]

This helps so much thank you :)😊

[@zhelyo_physics]

anytime!

[@yoshigod7480]

Can you go over how to draws/v/t graphs when the motion of an object is described in a question?

[@zhelyo_physics]

Great idea! In short: Constant force = constant acceleration = straight line; Increasing force = incresing acceleration = line getting steeper; Decreasing force = decreasing acceleration = line getting less steep No acceleration = straight line as the gradient is 0. Hope this helps!

[@alulamagin8340]

Thank you so much this is very helpful

[@zhelyo_physics]

anytime, thank you for the comment!

[@samuelhomer3997]

i like your climbing shirt

[@zhelyo_physics]

Thanks!

[@rosemaryzhang]

Have you got any OCR predictions for this year?

[@zhelyo_physics]

sorry I don't, it's kind of impossible to predict and I believe if I were to try and make a prediction it will do more harm than good as it's likely to be incorrect. Best is to learn the whole spec, do all the problems available. You got this!

[@samskordi6079]

24:00 With increased damping, shouldn't the max amplitude peak widen and spread over a larger range of frequency?

[@zhelyo_physics]

nope, it interestingly goes narrower

[@flynn5246]

The goat of physics at it again, carrying our A-levels, Thank you Mr Physics

[@zhelyo_physics]

Thank you so much for the comment!

[@OutForJupiter]

15:27 Bloops! 😂

[@zhelyo_physics]

I need to save these and do a compilation

[@Freepalestinefromisnotreal111]

Sir this mcq baffled my teacher and is ocr a:satellite of mass 3000 kg moves from a parking orbit of radius 6800 km to a geostationary orbit of radius 42 000 km. The mass of the Earth is 6.0 × 1024 kg. What is the magnitude of the change in gravitational potential? Answer is 4.9x10⁷J/kg

[@zhelyo_physics]

Sure, so: ΔV=Vfinal - Vinitial and the potential is negative So: ΔV=-GM/R_final - (-GM/R_initial)=-6.67*10^(-11)*6.0*10^24/(42000*10^3)+6.67*10^(-11)*6.0*10^24/(6800*10^3)=4.9*10^7 J/kg Hope this helps! The double negative essentially gives a plus.

[@seselimbu6011]

Hi sir doesn't the peak become broader as damping increases? Also very helpful video thank you

[@zhelyo_physics]

no problem! Yes it does become broader near the bottom for heavy damping, I should have drawn it better. This curve shows it well: lh3.googleusercontent.com/proxy/X9WH5ejuYRoUf4acHnZQ8tbDyeoQPFeTUsvvsfqE88eN4gBeM8bM8HbAQ83H9PSya9Qd4WqidlbSm63PfjH86sZWcM9xdJFVw8XtoRwjr3y5c8oM17qhgw

[@havoc_kr_yt712]

hello sir, i just wanted to ask what happened to the 1/2 when you were explaining the area of stress and strain graph around 5:34

[@zhelyo_physics]

so the area is 1/2Fx which is the formula for the elastic potential energy, since F=kx you can also write is as 1/2kx^2 : ) Hope this helps!

[@crazymemes2832]

a level next year 🐐

[@sagormehedi]

Sir pleaee do 1 for as physics

[@zhelyo_physics]

the first part of this one is definitely AS content : ) Hope this helps!

[@elma02530]

The goat 🗿🐐🐐saving me before exams

[@zhelyo_physics]

thanks for the comment! Good luck revising!

[@subhan8325]

hi. any tips on where to learn all the content for a level physics AQA and how to then revise/practice questions. i have eoy 12 exams in 4 weeks and im months behind please help

[@zhelyo_physics]

You got this! This playlist will definitely help. kzbin.info/aero/PLSygKZqfTjPC3hJ7nRSnnXTw3tI_o67dR&si=ea5vUV8Z_T5GKyEJ I also highly recommend the past paper questions on Physics and Maths tutor for AQA

[@subhan8325]

@@zhelyo_physics thanks sir. so for content i watch the videos for AS in this playlist and to apply i do questions, do you think i should make notes from the vids or nah

[@upcomingrays]

Sir did you use the predicted MME papers as a hint to make this video?

[@zhelyo_physics]

I don't use any predicted papers, as it's impossible to predict what will come up. I just looked at the specification and I went over important points but have also missed out on many important points too. The full spec cover is about 15 hours in my revision playlist : )

[@upcomingrays]

@@zhelyo_physics damn 15 hours 💀 but yea you did some how predict the MME predicted papers 🤣

[@thevelar7139]

Excellent jobb sirr ❤❤❤

[@zhelyo_physics]

thank you very much!

[@SpiderkingG]

A*

[@RiseProsper-lz5gb]

Exam tomrw is getting harrassed by my pen

[@zhelyo_physics]

good luck!

[@PeterRice-xh9cj]

One millionth of a second is too fast for us to remember or experience, so it’s fair to say that in that short span of time we have no sense of being or our sense of being doesn’t exist. The span of time we can remember or be aware of is joined together by spans of time that are too fast for us to be able to take any notice of, so how is it possible to have a sense of being at all. Let’s imagine an atom moves an extremely short distance. The span of time it takes for this atom to move this extremely short distance is too short of a time interval for us to be aware of anything, so where were we, or where was our sense of being. To us, the universe, a hurricane, or an infinitely long line of dominos that are falling down does not have a sense of being according to us. Say one day feels like one second to us, but one second just feels like one second to the person standing next to us, then according to the person standing next to us our sense of being does not exist. So what if we as conscious beings are both ourselves, as well as the universe. We can be ourselves where one second feels like one second, and at the same time we can be the universe, which solves the problem as not consciously existing at extremely short time spans. At extremely short time spans that are too fast for us to be aware of anything, we can’t say that we are different individuals because we don’t exist. Every one could be the universe. Imagine two zero dimensional points. These two zero dimensional points are not in any particular space, or are not separated by any space but are separated by time. Nonetheless, even though these two zero dimensional points are separated by time, they both still exist simultaneously. Let’s say one second was like one second to one of these zero dimensional points, but one second was like one day to the other one. That would make perfect sense as to why the two points are separated by time but still both exist simultaneously. So everyone could be their individual selves, and at the same time every one makes the universe. All numbers are the same because all a number really is is just the digit one that is a certain way up the number line, but the boundaries in between numbers really are different to the digit ones each side of them. So one of these two zero dimensional points that are experiencing time different from each other could be a boundary in boundary in between numbers, and the other could be a digit one that makes a number. Our sense of being may not be zero dimensional but four dimensional. We need to be focusing on a colour to have a sense of being, even if we are just imagining it, which involves time going by. If one hundred years went on while we had no sense of being, it would be like a flash to us. Let’s say we were each individual zero dimensional points all mixed together to make one single zero dimensional point where one second feels like one second. At the same time, in a span of time that is too short for us to be aware of or exist, we could all make the universe or another zero dimensional point where one week feels like one second. You see, we are saying the universe doesn’t have a sense of being, and in an extremely short span of time we are saying our sense of being doesn’t exist, so in that short span of time we could all make the universe or we could all make another zero dimensional point where one week feels like one second. If one second feels like one second to the zero dimensional point on the right, but one week feels like one second to the zero dimensional point on the left, we would see the zero dimensional point on the right as being us. In a super symmetrical way, what if there were other beings that thought the zero dimensional point on the left was them. If 20 people were all individual zero dimensional points that were mixed together to form one single zero dimensional point, the 20 would all agree on what number they are looking at because the 20 zero dimensional points would make one single one. But if 5 of the 20 disagreed with what colour the numbers and background were, the distance away the numbers are, and how far they are spread apart, would that 5 of the 20 form a seperate zero dimensional points point or individual zero dimensional points as well as the one they are part of. Imagine if how many, what colour, how far away, how far apart, all mixed to form a sense of how fast time is moving. Then if every one was part of one zero dimensional point where one second feels like one second, then no one could form separate zero dimensional points because they disagreed with what colour the numbers are or how far away or apart they are. If every one was part of the right zero dimensional point where one second feels like one second, they could be part of the left zero dimensional point at the same time, where one week feels like one second, because no body’s sense of being exists at extremely short time intervals. To us, a hurricane or the weather doesn’t have a sense of being. Our sense of being can’t be joined together by extremely short time spans that we can’t take any notice of, so everyone can be the one universe at the same time. If there were two things separated by time but both exist simultaneously, where one second feels like one second to one, but one second feels like one hour to the other, that would make sense as to why the two things are separated by time but both still exist simultaneously.

[@theodirisu8691]

brother graduated with a degree in yappics from oxford

[@lennyface2586]

erm what the sigma

[@waitingforsummericl]