Position/Velocity/Acceleration Part 2: Graphical Analysis
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- Опубліковано 17 гру 2024
- Everyone loves graphs! Especially when they give us so much information about the motion of an object. Position, velocity, and acceleration can be plotted against time, and these curves all relate to one another in interesting ways. Let's familiarize ourselves with the way these look, and how to analyze them.
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hello dear professor david.
i have been a physics teacher for 23 years.
i think you are a very good teacher.
i wish you succes.
Nice English bro 🤡
@@wp_aris1052 The fact that English isn't his first language couldn't be more obvious from the get-go just by looking at his name. Don't clown him over that, it's stupid.
@@wp_aris1052 you probably only speak one language so he’s already better than you
@@benjamingurevitch4097truth hurts
@@wp_aris1052 His English is grammatically correct. The only issue is not putting a capital “I”. Go touch grass.
This guy just explained to me what my teacher couldn’t in two weeks
“Ok”
Another great video :) I've completed a bachelors of physics and I still watch your videos!
that's the best compliment! let me know what you think of the series as it is released!
@@ProfessorDaveExplains Completely true, I should already know this because I finished High school at pre-University education, but now I start at my bachelor this kind of videos are very useful to repeat all the basics. I was wondering, do you have a video explenation in which you go deeper on the derivative and primitive relationships between displacement, velocity and acceleration?
you bet i do! check out "graphing functions and their derivatives" from my mathematics playlist!
Damn the best teacher in the history of all my physics teachers I think I’m bout to pass heheh
Honestly truly he's the best teacher ever and he has the best videos ever as well I actually hope he could also teach some of university subjects the way he explains makes everything 1000 times easier to understand honestly thank u a lot you're life saving
Best video ever! One of the few videos that can explain it a million times better than my teacher. :)
Teaching doesn't get any better than this.
My head is spinning 😢😢
you're not alone my friend :(
@Fjqu - thanks for being so considerate .
palms are sweaty, knees weak arms are heavy, there's vomit on his sweater already.....
who toucha ma MOMS SPAGHETT I
Just take your time and have patience. Keep at it😊
After you learn some derivatives it will make much more sense
One mistake though, but first: Good video, with excellent motivation, and discussion of real deviations from the ideal. I often use your videos when I am not in front of someone and cannot draw something myself to explain it, or otherwise have to do some education remotely with someone. For example right now I'm using this video to help motivate someone to study graphs in Algebra, since they have an interest in Physics.
I would highlight one mistake here Professor Dave, when you are drawing out the initial graphs, the vertical axis label for the velocity graph is in "m/s" (meters per second) but what you are graphing is actually meters per minute. Many people might think this is trivial but you yourself no doubt know, that when a student is first learning, any such error, in a textbook or lecture, or nowadays video demonstration, can really cost the student a lot of time, and or potential sanity -- because it is already difficult enough when you are trying to learn something new and challenging and you might get something wrong, so you assume that the material you are learning from is accurate. I'm not sure if you have the capability to go back and edit the video and change that part of the graph, but if not then you might want to add a subtitle or some such at that point.
ah shoot, yep i see where i did that. what a careless error! ah well. thanks for the feedback! unfortunately there is no way to edit or add a caption, which is a very frustrating part of youtube. make sure to check out my calculus content, i have one in there that hits this topic more rigorously from the math side.
Well, you the best god damn teacher! None of my teachers can explain physics as well as you do!
3:337 I just want to point out a minor typo: the second graph is in meters per minute, but the label underneath says meters per second.
I am at 7th grade by watching this I PASSED THE TEST WOHOOOOOO thanks prof dave :D
Thanks for explaining very clearly lot of subjects in your channel ! Thank u so much Dave !
Great channel for beginner.. Awesome video...thanks...
Awesome videos . You are the best teacher ever!
Explains this better in 8 minutes than my Physics teacher in 40.
this helped me alot my first video and already subscribed as i am going to study physics from next September in grade 11
thank you!!!!!!!!!!!
Hi, I just want to clarify, at 4:42, *if we use* the velocity-time graph to make another acceleration time graph then will the acceleration for the whole graph be 0?
yes technically since there is no change in velocity, except for the spots where it jumps, which would generate infinities, so that's why the velocity graph is not realistic as shown that way
@@ProfessorDaveExplains thanks so much professor Dave!
Hi at 4:40 u say it is impossible to go from a stand still to some velocity in an instant. I thought this was exatly what photons do when they are emitted. is there an expemtion for massless particles, or am i missing a basic principle here?
At 3:21 there's an error with the Velocity/Time graph. The velocity is measured in Meters/Minute and yet the velocity axis has a m/s units.
It's measured is m/s
Is there a way to know if an object is accelerating or decelerating without curves in the graph on a Velocity-Time Graph? All the lines in the graph my teacher provided are straight and there were only pointy edges, but there were questions about acceleration and deceleration. Maybe it's a trick question, but I just wanted to know what you think.
Well if you're looking at velocity, then any non-zero slope implies acceleration. Only if velocity is constant can there be no acceleration. If looking at a position graph then you do need to see curvature to infer acceleration.
Mr.Dave, thnk you a lot, it helped me. Greetings from Turkey, Istanbul.
I'm in 6th grade and in advanced classes so I have to learn this
Your video really cleared this topic up for me, thanks, Prof!
u r about to reach a mil subs, best of luck!
Instead of representing the time as Minute(m)
you should make it seconds cause it easier to solve it rather than minutes
canu make a video comparing speed ime graph and velocity time graph pls:)
4:10
I have a question professor, your velocity quantity is m/s; but your position quantity is m/min. I guess you should divide the distance in 60. I think that I'm wrong not you, but although I wanted to say that.
Think about it in terms of multiplying by 1 in a fancy way. Given 120 meters/minute, you multiply by 1 to convert the units. Multiply 120 meters/min * (1 minute / 60 seconds), which gives us 2 meters/second. The ratio of 1 minute/60 seconds is equal to 1, because it is two equal terms divided by each other. You can multiply by any form of the number 1, because multiplying by 1 doesn't change it.
Just found your channel. Awesome videos, thanks man!
yep i’m just going to cheat on my exam tomorrow because it’s not registering lol
I am an 8th grader trying to comprehend ._.
me too
what country r u from? i thought they teach these things to college aged kids in western schools?
@@suehiro_2024 Greenland
@@suehiro_2024 no, in the US we start physics in middle school science and then take AP physics in high school
Yeah, I remember all this from 8th grade. I’m a freshman now.
tq this was a very effective video for this subject
so true....
ya
?????????????????//
i have an exam tomorrow and this was so helpful
I’m your 494,000th subscriber
woohoo!
Thank you for this I really understand more to my lesson bec. Of this you are really good at teaching keep it up
3:37 y is the scale m/s when ur measuring m/min?
You can go further! Position goes to Velocity. Velocity goes to Acceleration. But you can also analyse the changes in Acceleration and then you get to something that psychics calls "Jerk". And it doesn't stop there. Go further and you get to "Snap" then "Crackle" and then "Pop". Yes these are named after the Rice Krispies mascots. No I am not making this up.
After watching this lesson I wondered if anybody else thought of analysing Acceleration to get another graph. And of course somebody else already thought of that. That led me into a rabbit hole that thought me these terms.
Reason I like physics:
This dude intro
IKR
his intro makes me feel like a kid
ahhh
can someone explain the acceleration graph question at the end of the video?
The acceleration is 0 since the velocity is constant
Professor you explain too good that I student of Standard 7 can understand easily.
Bro I’m not alone here in 7th too
Chears😂
Acceleration graphs usually look square. If they aren't square, you'd have accelerating acceleration, in which case you may need to graph the derivative of acceleration, which is called "jerk".
yep!
Hugely helpful. Thank you.
Why didn't you start from zero or the origin in the velocity-time graph for the first average velocity?
Thank you Professor Dave you helped me a lot..😊
But I have a question when to ask the distance ( _ ) and when to add it (+)
You assign a coordinate system arbitrarily, in whatever manner is convenient for the problem you are solving. You make the choice however you see fit, such that one direction is assigned positive, and the opposite direction is assigned negative. Sometimes a problem statement will specify the sign convention/coordinate system for you, in which case you follow what the problem statement specifies (so it is easier to grade). A common convention is to assign East as +x, North as +y, and Up as +z. The opposites would correspondingly be assigned negative.
Distance and speed specifically, are scalars, and the answer is always positive if the problem statement asks for these terms. If the term "total distance travelled" is used, then this means you ignore the sign of velocity as you integrate it. You find the positive area under the v vs t graph, and in a separate section you find the negative area between negative velocity and the t-axis. Then, put them both in absolute value bars, and add them together.
@@carultch thanks for help me ,
but you answer me late because i worked the exam since period i hope helped me earlier,
thanks though
Thanks, you're helping me a lot
Thank you so much
presumably acceleration is constant nevertheless it is assumed at rest overtime, this is hypothetical , acceleration will never flatten with time.
Of course it will. Take your foot off the gas pedal. Acceleration will drop to zero.
@ProfessorDaveExplains Thank you for the reply, I was referring to the quiz you gave, it was flat acc so how it could be when the velocity is constant? because there's friction in the air you have to keep velocity constant, unless we are in space take less effort for acc. am I right?
@@Georgeliam549 oh, well it says constant velocity, which by definition is zero acceleration
@ProfessorDaveExplains Ok thank you very much appreciated your quick response, and I followed you. you have absolutely amazing channel. And let's presume by its definition.
Nice lectures..
I just got an ad of old spice...
nice pfp
Get well soon ❤
You look like ssundee when you do the face at the beginning. Also your videos are great.
i love your intro~
Professor Dave ily
Surely a free Professor Dave Explains Shirt!?
Compleated my homework :D
I don't know that if someone else noticed that proffesor wore same shirt through whole playlist.
And there are about 38 vids in one playlist
can you explain time and space at zero acceleration ?
What is it that requires explaining?
Hey, maybe you could get those instantly changing speeds if you were modelling teleportation or Harry Potter apparating!
you save my life
The Man walking/running reminded me of Atari from the '80s
I'd doubts in this area but now solved
what app u use to make this video bro
adobe after effects
thank you
Done.
So object has 0 displacement since it come back to the same point?
Yep
Ahh so this is why joggers are always blowing through intersections, because jogging in place has no acceleration on the v/t graph. I'm curious if they take into account the rapid displacement of motion from the forward to the lateral direction that comes with being struck by two tonnes of steel with a perpendicular vector with a length much greater than their own. LOL, I'm an idiot.
Please make a video on collisions
i did that! look through my classical physics playlist.
Physics test tmr😢
I'm Arabian and I'm 14 years old but exactly 80% of the words that I hear every day is for English
I wish I had a brain
Why do we need to learn this? Pls reply i wnna know
in order to learn physics.
Professor Dave Explains Oh ok! Thank you for the comment
May god bless you
Him: blah blah blah
Me: watches the intro for the 800th time
👍
I CANT UNDERSTAND ACCELERATION WHATEVER I DO IT JUST DOESNT MAKE SENSE TO ME I SWEAR ILL CRY OMG😭😭😭😭😭😭😭😭😭
watch the previous tutorial which defines the terms
Professor Dave Explains i did that’s why i’m here, i’m not dumb i swear, my physics teacher is impressed and loves me but i just can’t make sense of acceleration
thanks for ur vids and hard work tho, defo helped me thru my finals last year, i’m a senior and acceleration has always been a pain
acceleration is just change in velocity over time, that's all
Thankyou jesus
bro u r better than my teacher😂
Who actually liked all the comments Dave liked?
I guess me only. LOL
add your patreon link in description makes it easier to find u there
good call! i think i will do that.
Hi
Love your graphics and explanations. Abhor your grammar!
Why is that? My grammar is impeccable.
@@ProfessorDaveExplains If he liked proper grammar, he wouldn't comment in sentence fragments, would he?
im so confused
prof dave great! he also really handsome..so easy to watch..!
beautiful man.
Damn on the graph it says m/s instead of m/min... this guy is fast as hell
Who else science teacher brought them here?
All I want to know is if my boi got his pizza
Our Saviour *Science Jesus*
the way he explains his videos are weirdly confusing. I'm taking AP Physics II right now, but his explanations and teaching method is just odd.
It doesn't get any clearer than this, bud.
My head is spinning like a ferris wheel😢
Lord im still confused
I dont understand
Echt leuk
i really suck at graphs
good stuff much better than cocaine
168th comment
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