What is a Joule? An Explanation
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- Опубліковано 5 вер 2024
- This video goes over an explanation of the metric unit for work and energy which is the joule. The joule is the derived unit in the metric system for work and energy. Work is done on an object when a force is applied to an object through a distance.
One joule of work is done on an object when a force of one newton is applied over a distance of one meter. The joule is named after James Prescott Joule who lived from 1818 until 1889. He worked on a principle know as the mechanical equivalent of heat which states that whenever a mechanical force is expended, an exact equivalent of heat is always obtained.
Subsequent videos will cover the newton and the watt.. The newton is the derived unit in the metric system for force. A force is a push or a pull. One newton is equal to the force that would give a one kilogram mass an acceleration of one meter per second squared. The watt is the metric unit for power. Power describes how fast work is done. One watt of power is exerted when one joule of work is done in one second.
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I love you are explanation I have doubts around 4 years about joule I watch your video my doubt was clear in excellent way thank u for making this video and I love all you are video
You are most welcome.
Amen
Well explained
OMG, i just got all the knowledge of jouls in a 9 minute video, thats insane, u teach sooo well!
Happy to hear that! Thanks for your comment.
i recently got put in 8th grade mid school year and its been a hard time understanding physics since i didnt start from the beginning in my class (everyone was way ahead of me in physics) but ever since ive found this guy on youtube i have been learning more and more, the more i watch his videos ,trully a blessing
Glad to be of help, best wishes to you.
Now, I have a clue. I am a layperson to anything science but, at the time of watching this video, I understood what a J/joule was. Part of this info will stick with this 70 something woman. Thank you!
Glad to hear this, you are never too old to keep learning!
Thank you, this clear explanation makes the understanding easy.
Great to hear, thanks for your comment!
Listening and learning here in New York City 2023 12:37 am Wednesday, March 15th watching and I should be sleeping ,because I have school tomorrow thank you for the video I appreciate it.
Thanks for listening and I hope you got enough sleep!
@@stepbystepscience 👍 yes I did get enough sleep and I have school tomorrow thanks again for the video
Excellent explanation for those with gray matter challenged...
Glad it was helpful!
You are awesome teacher
I have understood properly and you voice is really like a dream
Thanks very much. So nice of you.
I wish you give an example out in space. How do I calculate work when g is not a thing? And, on the definition of joules, they don't talk about time or mass, just force, and meter. Is there any difference applying 1 N over 1 m on 10 kg object or a 1 kg object, doesn't the time that I spend applying the 1-newton force over the meter matter at all?
Absolutely phenomenal explanation. Thanks!
You're very welcome! Glad you liked it.
Thank you so much for these videos which are so clear and concise and easy to understand.
You are very welcome and thanks for the comment.
my mind is about to explode, thanks I've never had a better explanation about this
So glad it was helpful! Thanks for watching.
That practical explanation was just lit... u lited it up
Right on man!
' Thank you teacher 'Your explanation Is very clear for me Congratulations!!! From Buenos Aires Argentina.
Glad to hear that! You are very welcome and thank for the comment.
Bold, confident in explaining, good sir
Thank you so much!
This is the first video I watched on your channel, and through the explanation I was always thinking: "Okay, I know how 30 Celsius feels, how does one Joule feel than??". I was impressed that you explained it eventually and now, I really understand. Thank you very much!
Thanks for the comment and I hope you watch a few more.
Mamamamamamamamamamamamamamammamajananan
I am indian sir you are great teacher in the world's
Very nice of you, thanks so much and greetings from Berlin.
Bro Thank you so much 😭
I've been wrecking my brain with this cause I'm always overthinking stuff and the helps me feel balanced again
Glad to hear it and thanks for the comment.
Yes
Thanks! I wanna become a physicist, well its my dream, and i am really good at maths, but i dont know why but i suck at physics.
Don't give up! One day it will click. Thanks for the comment.
Yes I am also good at chemistry and maths but I want to become a physicist.😌😌😌🤔🤔🤔🤔
this was super helpful, you explained it simply and i could keep up with what was happening throughout the whole video :)
Thanks, glad it was helpful!
you're a life saver, my teacher couldn't
Glad to hear it. Thanks for your comment.
It's cool that you still reply to comments from old videos
Yes I do. I love to hear from viewers!
Excellent step by step guide on joules. Sir, I salute you 👍.
Seasonal regards 🎅
Many thanks and best wishes to you.
Beautifully explained!
Glad you liked it, thanks!
Fantastic explanation
Glad you think so! Thanks.
Very nice. Easy to follow and understand
Glad it was helpful!
Is the warmth and heating of your body representing the "equivalent of heat obtained", after mechanical force is spent (doing a pull up)?
Part of it, yes.
You teaching is awesome
So nice of you, thanks a lot!
Very good explanation. Vivid bold and blunt.
Glad you liked it!
David Mc G - Excellent explanation
Thanks.
thanks sir...this is very helpful..
You are most welcome!
I want to ask something. When you are lifting 100 gram you are not applying 1 newton. You need to apply more than 1 newton for it to move up. Due to this when we consider ourselves, aren't we doing more work to raise it in the air?
If you are raising the object at a constant velocity then you have to apply one newton of force.
@@stepbystepscience yes it seems logical but how about the initial movement?
I think definition should be " 1 joule is the energy that we spent for an object to keep its speed constant at 1 meter per second for moving up"
Would this be true? And secondly what is the exact energy we spent before reaching 1m/s and going the first meter ?
It's not meter it's meter squared over second squared. Meaning a meter per meter...just as second squared s^2 is referred to as a second per second courtesy of wikipedia. When using the formula for calculating a Newton N = kg * m/s^2 ...the term s^2 stands for second per second. This s^2 term when used in calculating a newton stands for constant acceleration in other words a mass of 1 kg undergoing a constant acceleration of 1 meter per second would be accelerating at 2 meters per second a second later and 3 meters per second 3 seconds later and so on - so the question then is what does the m^2 stand for when calculating joules
thanks for teaching us with understanding way
It's my pleasure
This was so helpful
Great, and thanks for the comment
Keep up the good work
Thanks, will do!
Thanks brotha!!! I’mma definitely pass my asvab
Glad I could help and I hope the asvab test goes well.
ty for explaining. very educational
You are very welcome.
Thank You. It's been a while since reviewed these. Your presentation is very good.
I appreciate that, thanks for your comment!
I thought it requires you to exert 1N of force already to hold it still, off the ground? So would lifting the object away from the ground not require more force, causing the work required to raise it 1m to be greater than 1J (depending on the acceleration how much Work you actually put in it)?
So, to put it in numbers, if the acceleration (a) of Earth's gravity is 9.81 m/s² and the mass (m) of the object is 0.102 kg, Earth is exerting 1 N of force (f). So the exact equal and opposite force will hold it still in the air. So if you were to lift it you would have to accelerate it from 9.81 m/s² to for example 9.82 m/s² to be able to even lift it, causing the force to be greater, thus the amount of work over 1 m also would be greater. Actually 102 grams against 9.81 m/s² acceleration is already slightly over 1 N (1.00062 N to be precise), but accelerating it at 9.82 m/s², would make it even more, at 1.00164 N and, over 1 m, would therefore be 1.00164 Nm, or Joule of Work.
Am I doing this right?
Edit:
So, if I'm doing this right, then accelerating an object upward at 0.01 m/s² (which would actually be an acceleration of 9.82 m/s², if you add in the gravity) would be the average acceleration if you move the object 1 m over 13.643 seconds (0.01m = 1 cm, 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 cm = 91 cm (because for every second you accelerate 1 cm per second, so every subsequent second you move 1 cm more) and because we have 9 cm to go and will go at about 14 meters per second, we will need 9 : 14 = 0.642857, so approximately 0.643 seconds for the last 9 cm).
And by that reason, if moving an object of 102 g, or 0.102 kg up at 0.01 m/s², which would be an acceleration of 9.82 m/s² if you add in gravity, is 1.00164 Joule of work, then to exert 1 Joule of work with the same acceleration, the weight would have to be 102 grams x (1 N : 1.00164 N) = 102 g x 0.998363 = 101.833 grams, or 0.101833 kg.
Or easier: 1 Joule divided by the acceleration 1 J : 9.82 m/s² = 0.101833 kg of mass.
So, say you were to do a pull up of 60 cm (0.6 meters) over 1 second, that would be an acceleration of 0.6 m/s², plus the force of gravity, which is another 9.81 m/s², which would make your total acceleration 10.41 m/s². Then, multiply that by the mass in kg for the force, so in this case 95 kg x 10.41 m/s² = 988.95 N. And because you're doing that over a distance of 0.6 meters, you multiply it by 0.6 for Newtons per meter (Nm or Joule), so you'd actually be doing 988.95 N x 0.6 m = 593.37 Nm (or Joule) of Work.
Thank for this video
Most welcome!
saved my life, thx
Very welcome
Thank You for your common sense explanation-I wish I knew you when I was in high school !
Happy to help! Thank you for the comment.
Sir ur explanation is good tq sir ji
You're very welcome
Nice video thank keep producing such basic easier understanding videos
Thank you, I will!
Joule's contraption is an ingenious work of art.
Cristal clear!
Glad to hear it!
Awesome lecture
Thanks so much!
Thanku so much Sir
Best explanation
So nice of you, thanks!
I had a dream of housing units in the future. I took a minute to look at the power meter (today's meters are in kilowatt-hour). This meter of the future was in Joules. I want to say Joule-hour. It was a J followed by a backward lower case r.
Great learning. Thanks a lot
You are welcome!
Positive comment, very good info!!!
Up next...What is a Watt! It's gonna be good!
Like the explanation thanks.
Glad you liked it!
I have a Q that's been bugging me. A satellite can't hover over a non-zero latitude without doing work through its a thruster to keep it from drifting toward the equator. But technically one could stick a pole up into space and stop it from drifting toward the equator. As I sit here at my non-zero latitude part of the g that I feel is actually acceleration toward the equator, not gravity. I lean away from the equator, and the surface of the water in my cup is not normal to the direction of true gravity. If I just sit here supported by the floor, I burn no calories to stop drifting toward the equator. But if I get in a helicopter, some of the joules the helicopter expends go toward keeping the craft from drifting toward the equator and are not spent fighting the true g. So which is it? Does it take joules to stop a mass from drifting toward the equator or not? The standard answer seems to be "it depends" based on whether the mass is propped up by a solid object is in orbit or hovering on a gas. But the Mickelson-Morley experiment showed a small often-ignored fluctuation in the speed of light as though the apparatus were being accelerated as a function of latitude, if I remember correctly. So, is the ground doing work on our feet? Or not? Certainly gas particles bump up against certain places in a container harder than others, don't they? E.g. air bumps more joules into the top east side of the southern wall and less into the bottom south side of the eastern wall, such that the heat in the air is essentially in orbit, while the air itself has work done on it during collisions to correct its course away from its orbital path. Right. I'm told I have major conceptual errors but my in-head visual-spatial models make sense to me. Where have I gone wrong? I'm stumped. Thanks.
-Ryan
thanks a lot, it actually helps :D. It helps me in a lesson preparation
You're very welcome!
Thanks a nice comment given.
Thanks to you too.
Tremendous video! Very clear and easy to understand. Appreciate you sharing!
Glad it was helpful!
wait so... if the object is on wheels it would mean that it would take less force to push, so does that mean that it would take less joules to move an object with wheels as opposed to an object flat on the ground?
Yes, it would require less work because the force would be less.
I do not know how to ask you this ,but when you go back and fort between newton and joule I get confused can you explain in a way that anyone at any age could understand.
thanks for the video!
My pleasure, and thanks for watching!
Very good video sir
Thanks, glad you liked it.
Well done! We like knowing the why and how etc etc.
Glad to hear it. Thanks for your comment.
Was looking for a good explanation for a group of students im gonna teach. This was exactly what i was looking for, thank you!
You are very welcome.
👏 . I never realized I didn't know what joule is till I tried explaining it to my nephew. Great explanation 👌 👍
Glad you liked it, thanks for the comment!
You are an amazing teacher, thank you so much!
Wow, thank you!
brilliantlyexplained
Thanks so much!
thank you thank you thank you this helped me so much in my modules cause my teacher didnt explain it well thank you
You are very welcome.
i just bought a 20 joules electric fencer. i have 3, 1 joule each. i am a farmer. sheep, cattle, goats, hogs. with my miles of fence (5 strand 12.5 ga ht wire and poly wire), and plenty of weed load, i hope the fence is 20x more psychologically embarrassing than the 1 joule fencers i love. understandably, the dry season doesn't help the critters find earth. i still don't have a clue what a joule is. but hope it means punch for the buck! i paid over $1000 for the fencer.
good explained
Thanks so much!
Very good
Tq.
Thank you!
Welcome!
just, this is great
Thanks for the comment.
Finally, I've got it. Thanks man
No problem 👍
You are the best. You are straight to the point and clear. Thank you.
So nice of you, thanks very much!
Well explained
Thank you very much for the comment.
Thanks this helped alot
Glad to hear! You're welcome.
great video
Thanks!
If hold 100g in my hand I will experience 1N because of resisting the 1N given by gravity .....if I just wanted to raise that 100g to 1m I need a thrust that should be greater than 1N so is I am applying more than 1N of force through 1m......pls crct me if I am wrong.....
If you are holding the 100 g at rest and want to starting it moving (accelerate it) then yes you will have to apply a force (not a thrust) of greater than 1N. But if you move it at a constant velocity then the force needed will be 1 N. Does that help?
What about the time it takes to lift the object ?
That is probably a different video which I have not made yet.
Nice presentation. Good information. But questions are remaining at 2020
Thanks, let me know if you have questions about the video.
@@stepbystepscience
Could you answer me, my All stupid questions. About force, joules, calories, Energy gravity mass distance and the main thing is c^2. etc...
Yes to the metric system. I was watching some other video about energy but unfortunately all of its written content was in full caps lock and it uses the unit of CALORIE. As there are 2 different measurements for calorie (apparently differentiated by the casing of the "c") I truly wished that it had used the unit of Joules instead.
Great point! Thanks for the comment.
I thought C was the speed of light?
so if you lift an object for a metre it =1nm what if you put it back down like lifting a dumbel
On the pullup problem why was the acceleration 9.81
Because you are working against gravity and acceleration due to gravity is 9.81 m/s2.
@@stepbystepscience I get that that would be the acceleration downwards but if you going up the acceleration wouldnt be like that would it?
@@stepbystepscience because I dont think many people can do a pull up that fast because nine meters faster per second is pretty fast
Great! Thank you!
🙏🙏🙏
Welcome!
You solved the mystery!
Thanks, glad to hear that!
You're a wonderful teacher!! Thank you, it enlightened so many doubts I had... 😁
Glad it was helpful and thanks for the comment.
Yes
Nice and simple, good one cobra
Thanks 👍
Thank You so much!!!
You're very welcome!
Very nice,a little more info on the equivalent derived units of the joule will be of help thx...🙃
Glad it was helpful!
Excellent!
Many thanks!
thank you for this it helped
You're welcome! Glad it helped.
You have cleared all my doubts. Thank you very much.
You are most welcome
@@stepbystepscience Thank you for replying me in this old video. Some youtubers don't respond at all
where did you suddenly get that 9.81 m//s^2 value???
Thank you sir
Welcome
Thanks for helping
Happy to help!
to take 0.102 g and lift it through 1 meter isn't necessarily 1 joul, we should know by which force we are lifting the 0.102g.
The force needed to lift 0.102 g is 1 newton...F = ma = 0.102 g x 9.81 m/s2 = 1 N
I think if we apply 1N to lift it up there's one another Newton applied by gravitation, if we want to lift it we should apply more than 1N.
Thanks helps a lot
Glad it helped!
What does ''work'' mean in this context?
In physics work is done when you apply a force through a distance. W = force x distance
Thank you.
Welcome!
THANK YOU!!!!!!!!!!!!!
Welcome!