GCSE Physics - Distance-Time Graphs #53
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- čas přidán 2. 12. 2019
- This video covers:
- How to interpret distance-time graphs
- How to calculate speed on a distance-time graph
- What the gradient of the line means
- Drawing a tangent
General info:
- Suitable for all GCSE and IGCSE courses
- See below for whether it is higher or foundation tier for your exam board
- See below for whether it is triple or combined for your exam board
Exam board specific info:
AQA - Everything is relevant to your course!
IGCSE Edexcel - Separate science and higher tier only
Edexcel - Everything is relevant to your course!
OCR 21st Century - Everything is relevant to your course!
OCR Gateway - Everything is relevant to your course!
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video
If you’d like to practise what's covered in this video, check out the lesson on the Cognito platform - cognitoedu.org/coursesubtopic/p2-gcse-aqa-h-t_3.04. The platform’s totally free, and has been built to make learning and revision as easy as possible. The main features are:
- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
- Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on.
- Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like.
- A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts.
- A comprehensive bank of past exam papers, organised both by year, and also by topic.
Amadeus & Tom
Hey cognito , can u use differentiation to find a gradient at a specific point instead of drawign tangents ??
Ok this literally helped me with my hw. I had no idea what my tr was saying.
Same lol
ikr
Man’s acc uses this for hw 🤣💀
Same
Same here
When your teacher keeps talking whilst your watching the video
so true xD
To look like they understand💀😭
Wdym
THIS HELPS SO MUCH I FINALLY UNDERSTAND
103 takis are fanum tax
I've been trying to understand this for 4 months. you've cleared it up in less then 10 mins. I'm so grateful.
4 months?🤣🤣🤣🤣🤣🤣
@@user-dj7ic1xs2p just because he learned at a slower rate than you does not mean he is dumber than u, in case you are thinking of that ( which I know you are lol). He probably has way better grades than you, for all you know. So you shouldn't judge someone by their learning rate. Who knows, learning slower than some people could prove to be beneficial to ones self.
@@enyplayz1514 you didn't understand what i meant, i meant this video makes us understand about this topic easily.
@@user-dj7ic1xs2p chill guys dont go personally
BRO YOURE SO GOOD THAT IM FINNA TURN AUTISTICCC HOW TF DO YOU EXPLAIN ALL OF THAT IN LIKE 4 MINS WHEN MY TEACHER COULDNT EXPLAIN IN 6 HOURS
searching for weeks to find the ONE helpful video and i found it, great because now i can pass my science class semester!
It covers everything in a gcse portion...thank you SO MUCH!!
I understand but it won't be precise. As for the tangent, we won't know how long we should draw. So it will only come as average?
Man thats so easy understandable and will help me in my exams
Nice profile pic
Thank you so much have a physics test tomorrow and this really helped!
I’m on a zoom call right now while having to watch this, I can’t focus lol
Lmao.
When I see a number u already lose intwrent.
Is a straight line and sloped line the same? Becuase sloped line shows movement and for a sloped line m is shallow
A bit late but a straight line is stationary and sloped is moving
Hope this helps others
@@Zoeva37 a bit late but i think he ment the first line
CHINNIAH SIR IS THE BEST SIR IN THE WORLD
Gma
GMA!?!
brilliant you kept it short and covered everything we need to know
I did my mocks and hopefully went well cause of this
Ahh good luck Buzz! Wishing you the best mate :)
@@Cognitoedu🪄
Simple and direct. Thanks
If it was in hours (let’s say an aeroplane was flying at 380mph for 9 hours and you would need to find the distance) would you make the hours into seconds so would you do 380x540?
Hi, it depends on the units that the question asks for. In the question that you mentioned, the 380 mph is already per hour, so you would just multiply is by 9, to find that the plan travels a total or 380x9 = 3420 miles.
Sometimes though you may have to convert hours to minutes or seconds, and distances like km into m.
Cognito ok thank you 😊
Or you could also try converting km/hr to m/s
Thanks for this
Thanks this helped me in preparation for exams
But doesn’t that mean that your speed can vary depending on how long you draw your tangent?
I don't think so as then the distance and time you use would change along with it, however im unsure.
No; as you increase the length of the tangent, you increase BOTH the time and distance travelled variables for that line. This means that there is no net change.
Think about it visually using the graph in the video.
if only all teachers were like this.
That made me understand it very good (the best)😊😊
Great video! This topic is very confusing so thanks very much!
Literally you helped me in every paper and I scored A* grade in all!
Congratulations
this helped me SO MUCH in my ks3 assessment THANK YOU!!!!
Glad we could help TNT!
THIS HELPS SO MUCH I FINALLY UNDERSTAND °THANK YOU
YAY 🙌
THANK YOU SO MUCH!!! I have physics final tomorrow and this saved me
An incredible video, surely, and I loved it. However, I still have doubts regarding the concept of tangents, and their applicability, and hence request you to clarify how it is used with a non-uniform gradient. Hope you'll be able to clarify that
The problem is that i dont know English so much but I love science physics especially about the space
Omg soo useful vedio!!! I was literally searching for the best video, and now I have it💜
Yeah
@@armyaseel7bts army?!!😭💜😭
thanks a lot man this helped me alot
Literally the basics of calculus 3:00
So a straight line is when the object stops. A diagonal line going up is acceleration, and a diagonal line going down is deceleration and a horizontal line is when the object is stationary?
help i have two questions how do we know what length to draw the tangent? and when finding the gradient from tangent like why at 2:42 the blue dotted line why did it start from where it did on the tangent line why not from like the ends of the tangent line? is there a specific reason why rose blue dots to find distance started at those parts of tangent line?
I have the same question
@@a_active9904 i guess we’ll never know
I know how to do it now
1) draw the tangent until the end of the graph
2) PLOT a point on the number of seconds given.
3) CHOOSE YOUR OWN POINTS, so you can choose the amount of distance you want (it could be anywhere but choose a sensible one)
4) find the difference in vertical and horizontal between the line you have chosen and the line that was given.
5) Divide them vertical/horizontal
6) On your answer sheet you should get a number between something, e.g 20-25. You should have the number between it if your right (it could involve decimals).
It doesn't matter how long we draw the tangent line. We're just using it to find the gradient (or you might prefer "steepness") of the green curve at that particular moment. That tangent line is straight, so it's the same gradient all along it's length, no matter how long it is. All that matters is that where it touches the green line, it's the same steepness/gradient. As for where the blue lines were, I'm guessing he had an eye on the time axis and wanted the lines to go down to 6s and 9s, so it was a nice easy 3s difference.
Sorry for the slow reply. As mentioned above, it doesn't matter how long you draw the tangent, as it's a straight line - the gradient will always be the same, no matter the length. We chose 6 and 9 seconds because we knew that would give a simple-to-understand 3 second difference which would help make a clear video :)
I have a question. In my textbook (and class) there is a different method of finding the speed out, but I don't get that one either. It says speed = gradient of distance - time graph. And then there are four steps which tell me to find the straight section of the graph and draw horizontal and vertical lines to complete a right-angled triangle. So can you please explain this?
the gradient of the distance-time graph is the speed. so basically you can find the speed by finding out the gradient of the line. if you don't know how to find the gradient of a line then maybe search it up because its more a maths thing than science. sorry i wasn't sure how to explain but i hope it helps! :)
@@jess2320 y=mx+C
THANKKK YOUUUUU SOOO MUCH I AM SO MUCH FICKIHG STRUGGLING WITH PHYSICS ... YOU HELPED ME AGAIN COGNITO MAN
Your explanation is great, wish my teachers explanation was like yours
This video was very helpful, thank you 😊😊
so for finding the tangent on a line, you can pick any points? it doesnt matter which 2 points you choose?
I love this channel!
Thanks Edwin!
❤❤❤❤thank you 🙏 very much now l have an idea about distance time graph please teach me all about graphs a video please
But how long should be the tangent, how can we know the size of it before making it to find the speed for a curve
3:14 onwards is summary
Does the curve in a distance-time graph represent changing or constant acceleration?
🤗🥳 you are Amazing!
Totally agree
Thank you sir it makes me easy to understand the concepts I hope it may helpful in my neet UG
Sir what it (9-1) meams
9-1 is the GCSE grade basically. 9 is the highest grade (think of it as an A*) and 1 the least. I think that’s the 9-1 you’re referring to anyway.
Nah it means o1
Thank you man 😎😎🥳
Thank you so much ❤️🧡💙💜💚
best than our teacher
Watching this at Morning, hour before exam.
this helped me so much cause in cgp they write it so unclear like i didn't even know what a tangent is anyways thanks (ps the world would be in shambles without you)
Really happy you found it helpful - thanks for the comment :)
Why is the gradient 0 at the stationary point
because there is no movement no distance travelled
Bro im literally seeing myself in my graduation attire right now fr🥲
im on science class rn im watching this lmao help
What's the length of the tangent supposed to be? does the length matter?
Thanks mate i got my gcse physics on the 25th of may
Grateful!
that is very good
I understand these things well but come here for better understanding and great drawings for my notes... new subscriber
Ah thanks Alishba!! 🤩
can u please help me with the tanget part
still need the explaination?
@@raspberry1054 xd that was when i was in 8th , anyway thanks
@@atriumgangsterz1939 lmao np
thats like 1 year ago, u make it sound like it was 6 years ago no offense😂 tho u made me laugh a bit so thx for that lol@@atriumgangsterz1939
I just wanted to ask that is it really necessary to draw a tangent bcz we can also find it normally by looking at the graph??
Epic!
How to know how long the tangent?
This was so useful, but I sometimes find the sound of his voice fades and some words are difficult to hear, not sure if that's just me!
Thank you
Is the speed time graph the same as the velocity time graph?
I dont think so i know im late and you probably know how to do it already
THANK YOU
When you have a doubt in class😮
Teacher: how many times i am gonna taught this to you???!!
Random man on youtube : i will teach you my son/daughter
By the way this video helps me so much in exam that's why i am writing this.😅😅
best video for kids
kids?? man u is smart, this shit gsce level xD
ik Its too late okay but .. alot of pple in this comment section seem to be understanding what is done here but I can't really understand the part where uu calculated the 'tension' (if im correct with spelling) around 2:30 ...plz help 😭
This didn’t help, I’m really confused still
even now.....?
thank u so so much i was abt to fail physics until i saw this vid
Still using these vids to this day 😂
make more than ever
I still didn't get it
Like won't the speed cart bcz of the variation in the tangents length
I mean it depends on us where we mark .
I am still confused and have some questions.
how did u find the 12 for change in distance?
HELLO
Very helpful thank you so much
i meant it's so understanduble
This is worth 5 science lessons ong
my teacher in school was bad at teachin physics. so i will only took the topic and study here
The true answer YAYY
How much long enough should the tangent be
I have the same question, did u find out tho
yes, the length of the tanjent can be drawn to infinity, meaning that u can draw the tangent small or big or medium, or however long u want it to be, because the graident will be the same, no matter how long the tangent is@@MsHustle247
what does a square respresent?
It is like the different bits of the journey travelled.
Tomorrow is my physics 7th final amd i am studying from here
decweaseeeee
i dont understand the exam questions that distance and speed time graphs have, the questions are worded differently and confusing
gosh i had to learn this at grade 7 bruh 😭
YO WAT im in highschool and im just now learning this and im 16😂
wait isn't the change in time is equal to 4??
Let's break this down. The change in time is the greatest amount minus the smallest amount.
9 - 6 = 3
thanks bro that cleared up one of my thoughts@@o4711
E
demostration
This helps I understand now
❤️
God I'm never watching my local education channel again they take half an hour to explain the same point that you explained in five minutes. besides a single part of a lesson is like 2 hours. oh they are super boring. besides I can choose the point that I want to know super easily. may god bless this channel.
and please open a patreon so that people can donate to this channel.
Anyone els here from science at churchill
igcse board brother wrong title
i have aa end of topic test so this is gonna help me for tmr skl
0:56
When the accent is too deep