A Level Physics Revision: ALL of Motion (in 42 minutes)

[@rainehughes3748]

This video was super helpful! Honestly baffles me that i can learn more in a video the length of one period in my physics class than actually sitting in my physics class with my teacher explaining lol.

[@zhelyo_physics]

Thanks a lot for the kind words! Glad this is helpful!

[@creampieguy6950]

Brilliant video bro. Mocks tommorow and this is just what I needed

[@zhelyo_physics]

Glad I could help!

[@umrnaveed8]

Best physics channel on this platform 100%

[@zhelyo_physics]

wow thank you so much for the amazing comment!

[@LorenaAna-x5b]

best classes I’ve ever seen, there’s no doubt that it will save my quiz tomorrow

[@zhelyo_physics]

thank you for the comment!

[@youngfooty513]

your tone is perfect.... i have a background study sounds and this vid played and im lovin it

[@zhelyo_physics]

Thanks a lot for the comment! Much appreciated!

[@toriiramlall6638]

This was a very helpful video. Thank you for all the effort you put into all your videos. I really appreciate that 🙏

[@zhelyo_physics]

Thanks for the kind words! Good luck revising!

[@beepboop5732]

exam tomorrow and i've been studying with your videos for the past two weeks so i have some high expectations

[@zhelyo_physics]

Good luck tomorrow! : ) You got this!

[@iris5212]

A year later so how did it go

[@aezistudy]

Thank you for the detailed lesson. It was easy to understand compared to how my teacher spent over 3 months and ripped my brain

[@sinodosande6789]

21:26 if we square -5, we get 25, meaning then the negative signs don't cancel out. correct me if i am wrong.

[@imogenlynch7027]

Yes, but it is -(u)² so it would be -(5)²=-25

[@JohnZhuwawo]

That's wrong because our -5 is not in brackets so we have work it like this 5×5 =-25 but when it appears like this (-5) squared we have to work it like this (-5) × (-5) this is where negative signs cancel each other to get 25

[@liza.56]

Besttt vedio for physics wish i found it earlier😢 but Still😍 better late then never

[@zhelyo_physics]

thank you for the comment!

[@hibye88_]

This video saved me.. thank you very much 🙏

[@zhelyo_physics]

thank you for the comment!

[@luddy20]

at 37:40 why is acceleration negative and why is displacement positive if the car isn't at the original position?

[@zhelyo_physics]

as the car is decelerating and they are in opposite direction. Hope this helps!

[@lol-xe2oq]

22:00

[@Rayyjan]

Hi, at 27:25 can you just use one light gate at the bottom and say that the initial velocity is 0?

[@zhelyo_physics]

Yep!

[@ShahanIslam01]

My one is IAL edexcel board, I think it's pretty much the same topics. Mechanics, materials, waves and particle nature of light, and electrical circuits. 4 topics in that order

[@zhelyo_physics]

they are extremely similar! Good luck and leave a comment under a topic video if something doesn't make sense!

[@ShahanIslam01]

@@zhelyo_physics thank you 😊. Will do

[@neptune4434]

Can you please make a video on negative graphs for vector quantities like acceleration and velocity.

[@zhelyo_physics]

Interesting! What exactly do you mean by negative graphs? Thank you for the comment and idea.

[@neptune4434]

@@zhelyo_physics like ball bouncing velocity time graph the line goes below zero .Its hard to understand(for me) they are in past paper questions like m/j 15/p22/q2

[@athulgireesh3725]

thank you for this helpful video 💕

[@zhelyo_physics]

anytime! thanks for the comment!

[@urdudebatesabdulmoeez]

extremely helpful videos.Best Sir

[@zhelyo_physics]

Thank you very much for the comment!

[@sunnychang366]

For the braking distance, can we use the s = 1/2(u+v)t instead? Or s = ut + 2at^2

[@varan2412]

Normally the independent variable is on the X axis so why is it in the experiment to determine g is h on the y axis when that is what we are varying

[@zhelyo_physics]

as long as the gradient is consistent it doesn't really matter for a level physics unless the questions specifies exactly the graph

[@varan2412]

@@zhelyo_physics ok thank you

[@himesad1259]

hi sir i check your practice questions playlist but i was wondering if you could do one for ocr a 3.1 motion. If it isn't too much for you.

[@zhelyo_physics]

Sure! Thanks a lot!

[@HH1-n1x]

Hi, very useful video, your technique of teaching is so beneficial. just a quick question , are vectors included in the 'motion' topic. I have an exam on= Mechanics (Motion; Projectiles; Dynamics; Statics; Moments) and would i need to revise vectors - adding subtracting etc?

[@zhelyo_physics]

I would, even if it's not formally part of the section, adding, subtracting vectors is pretty crucial for this. Good luck!! : )

[@luddy20]

sir how do you recommend remembering concepts and practicals for my a level next week? love the vids!

[@zhelyo_physics]

my playlist : ) kzbin.info/aero/PLSygKZqfTjPDgdq6nvUV29YBSsAuPisBp

[@luddy20]

@@zhelyo_physics THANKS SIR

[@alanoorbakhtyari9086]

@@luddy20 how did it go?

[@diyaresf2296]

thanks man!

[@zhelyo_physics]

Anytime!

[@shingaimutambara682]

A student standing on the platform at a railway station notices that the first two carriages of an arriving train pass her in 2seconds and the next two in 2.4sec. The train is decelerating uniformly. Each carriage is 20metres long. When the train stops, the student is opposite the last carriage. How many carriages are there in the train? How do i solve it?

[@zhelyo_physics]

so, I'd find the average velocity of the two instances and calculate the acceleration. Then assume the average velocity to occur at the middle of each passing as acceleration is constant, i.e. vaverage happens at t=1s and then at t=2+1.2 seconds. Then use v=ut and then s=ut+1/2at^2 to find the total distance and divide by the carriages. Good luck!

[@ranawaleed5352]

Great explanation Sir... Thank you very Much... Is it clears all of the CIE motion syllabus??

[@zhelyo_physics]

Most of it however please check with a printed syllabus to use a check list. Good luck revising! : )

[@WMTechHub-h6n]

Thank you

[@zhelyo_physics]

Anytime!

[@JhanviSharma-xr7xm]

Can I use this video for AS level physics OCR rather than just for A level?

[@zhelyo_physics]

absolutely, this is exactly the same spec

[@lnourral5272]

I love you , u are brilliant!!!!!!!!!!!!

[@zhelyo_physics]

Thank you so much for the kind comment!

[@ahnafrafedahsan929]

do you have the notes in a seperate file or anything? it would be very helpful if you could provide one

[@zhelyo_physics]

sorry pal, only the videos are available. Good luck revising!

[@Me-nc8rr]

my teacher says it is -9.81 regardless of which direction it goes why do you have conditions for your +/- gravity .

[@zhelyo_physics]

It is 9.81. Sometimes in calculations it is convenient to take the downward direction (gravity) to be negative if something is going upwards. You can do it the other way though and keep acceleration positive but then velocity/displacement or whatever else you are calculating would be negative. Hope this helps!

[@HudeerKhan1]

is this playlist suitable for syllabus GCSE AS Level

[@zhelyo_physics]

you mean GCE AS Level right? If so, yes.

[@MaskedChieff]

Great video!, but can I know which ones are the AS ones please?

[@zhelyo_physics]

Sure - this playlist up to Quantum Physics, the rest is A2 (if you do OCR A, if you do a different exam board, check with the specification). kzbin.info/aero/PLSygKZqfTjPC3hJ7nRSnnXTw3tI_o67dR

[@MaskedChieff]

@@zhelyo_physics Your the best!, my board is CIE!!

[@zhelyo_physics]

Thanks a lot for the comment! Definitely check with the syllabus beforehand to ensure they cover everything. If not drop a comment if something is missing.

[@MaskedChieff]

@@zhelyo_physics I just checked and everything is covered, I really appreciate it!!!

[@s1mples1mple48]

nice video, comment from china

[@zhelyo_physics]

thank you so much for the comment! : ) All the best!

[@Bulldog01234]

They don't usually ask questions to show the derivations of the equations, right?

[@zhelyo_physics]

They do, those two derivations of energies are actually on the spec and have appeared a few times. In other modules things like Kepler's third law, escape velocity, etc appear all the time. Hope this helps!

[@Bulldog01234]

@@zhelyo_physics oh! I'm actually doing CAIE. I wrote as-level physics in may/June 2022 and I've solved some past papers I didn't see any questions about the derivations. I will be writing AS and A-level again this May/June. I will study the derivations Just in case. I love your videos they are accommodating, thank you!

[@zhelyo_physics]

Thank you for the nice comment! I have just looked at your syllabus: www.cambridgeinternational.org/Images/554625-2022-2024-syllabus.pdf See page 19, both derivations are on there, so I'd make sure you cover them.

[@Bulldog01234]

@@zhelyo_physics I guess I must've missed that when I saw the syllabus sheet. Thank you, very much for checking it out I really appreciate it. Once again Your videos are really really helpful.

[@Pro_5tar]

Sir I am from Pakistan And doing As level right now Does this video cover the whole kinematics chapter of physics I will be giving CIES next year

[@zhelyo_physics]

It should do yes, but please double check your syllabus and using it as a check list. This way you will also be confident in your own learning.

[@Pro_5tar]

@@zhelyo_physics Ok Sir

[@HudeerKhan1]

is this whole playlist of AS Level or A2. Please answer

[@zhelyo_physics]

Hi this is for both, about the first half of it is for AS and the whole for A2. Always worth looking at the syllabus/specification to see which exact topics are for AS/A2

[@helena5433]

Are all ur vids only for AQA or all exam boards? Because I am doing OCR so I’m not sure if is suitable for me, please reply thanks

[@zhelyo_physics]

Hi I teach OCR, to create those videos I actually followed the OCR specification. For AQA I added a few extra videos for some specific parts and I have labelled them. Generally, all exam boards are extremely similar so suitable to all.

[@isaaczulu5978]

In fact the value of g is always negative because it always in the direction of negative y-axis, I.e. always downwards!!!

[@zhelyo_physics]

Nope, we can take positive or negative to be any direction in physics, as long as it's consistent it actually doesn't matter. In A Level, we take it so that it's negative if the object is slowing down i.e. negative acceleration. Hope this helps!

[@udayreddy3705]

Hi sir all your a level physics revision videos are OCR A spec right ?

[@zhelyo_physics]

Hello, yes, however the content is very similar across the exam boards with the exception of the AQA options which I will be filming this year.

[@Nitrogen7Gamer]

I do ocr is this video for me?

[@zhelyo_physics]

absolutely, it follows the OCR spec point by point (all points are also applicable to all exam boards)

[@luddy20]

also which videos are for AQA? I know most of your videos are targeted to OCR students

[@zhelyo_physics]

the spec covered is almost identical except for the options and particle physics, I have separate videos for this at the end of my a level physics revision playlist. Hope this helps!

[@H1289-h8o]

Will alevel physics ever ask you to define Displacement (OCR)

[@zhelyo_physics]

they could, anything that's on the spec we may be asked to define.

[@AmarachiOjukwu]

Nice

[@zhelyo_physics]

Glad this is helpful!

[@ayman9517]

W video