Gravitational & Electric Fields - A-level & GCSE Physics
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- Опубликовано: 1 июл 2024
- scienceshorts.net Re-uploaded due to a couple of mistakes!
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00:00 Field lines
01:56 Newton's law of gravitation & Coulomb's law
03:28 Potential energy
04:31 Field strength
07:09 Potential
09:45 Potential gradient & graphs
11:48 Parallel plates
12:59 Field strength inside planet
13:36 Field strength between masses
15:01 Resultant potential -
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Respect you a lot love your explanation
Buh you didn't teach escape velocity
I gotchu ruclips.net/video/rhwrCdwuFdM/видео.html
@@ScienceShorts When you say W = FxD, and therefore you potential energy is the force formula times r... how do you reconcile that the force isnt constant? Surely it would be W = mean force times distance and therefore the mean value of GMm/r² between 0 and r times r? Does it work out the same?
@@ScienceShorts Nm it works out the same
@@ScienceShorts WHAT IS E=MC2 is taken directly from F=ma, as the rotation of WHAT IS THE MOON matches the revolution; as TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE. c squared CLEARLY represents a dimension of SPACE ON BALANCE, AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE). The stars AND PLANETS are POINTS in the night sky ON BALANCE. Great. It is proven.
WHAT IS E=MC2 is taken directly from F=ma, AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE).
CLEARLY, gravity AND ELECTROMAGNETISM/energy are linked AND BALANCED opposites (ON BALANCE); as the stars AND PLANETS are POINTS in the night sky. Consider TIME (AND time dilation) ON BALANCE.
Consider WHAT IS THE EYE ON BALANCE. Great. Consider what is the fully illuminated (AND setting/WHITE) MOON ON BALANCE. WHAT IS E=MC2 is taken directly from F=ma. Great. TIME is NECESSARILY possible/potential AND actual ON/IN BALANCE, AS ELECTROMAGNETISM/energy is CLEARLY AND NECESSARILY proven to be gravity (ON/IN BALANCE).
By Frank DiMeglio
paper 2 grind now lets get it!!!!
Yh trying to revise the whole module 6 in few days :D
is their even a point after paper 1
@@themaher20000 I'm guessing you did Ocr B
Davis Studio i did edexcel
never give up!!!
i was having a mini breakdown about fields bc my exam's in two days but thank you so much for this - it makes so much more sense now :')
so true...
what did u end up getting if u dont mind
my exam is this afternoon, wish me luck 🙏
i have awakened
This is such a good video, learning these two together makes so much more sense than being taught it separately! Thank you
Anyone notice the 4 and 10Jkg^-1 when his hand went over them. The number stayed 😂
Sshhhhhh...
Wtf
you are way better than my actual teacher, thanks for these great videos!
Amazing job man!!! You made it so easy. Even after reading from the book numerous times this chapter was difficult to understand. Thanks a lot!!!!!
This video makes everything so clear, linked and easy to remember. You make my favourite videos and save my understanding.
Thanks! 😊
Still think you should sell some shorts on your website... just saying m8 i'd buy them 👖
Wish Teespring did them! Maybe I'll look into a supplier...
@@ScienceShorts YES!
That is the clearest explanation I have ever seen. Thank you sir!!!!!!
Well explained!!!This video is so clear and very helpful to revise the topics under gravitational and electric fields.
Extremely grateful for your videos. Great explainations
This is soooooo helpful! I understand these concepts now, you are an amazing teacher
You are amazing! The best video on this topic by far! Thank you so much!
IDK Why people degrade their teachers , every teacher is hardworking in their on way . Stop this and appreciate everyone.
Wrong
Very wrong
you must be a teacher
Say something stupid to my face and your gonna learn a lesson.
He is right. Respect your teacher. Even if you can't understand anything from their lecture.
Much better than my actual teacher, thank you so much!
AQA paper 2 on friday, im having a major breakdown because i have to learn Grav + electric fields, Magnetic fields which is the worst, capacitors also trash, and then all of the nuclear stuff so id say im pretty screwed. but dw ill bring the grade boundaries down for everyone else
Same lol, just started revising today. Left it way too late.
Best thing I can recommend is to use www.physicsandmathstutor.com/physics-revision/a-level-aqa/
Check the "key points" slideshows and do all the questions you can in what little time we have left.
Good luck :)
@@MAN_FROM_BEYOND idk why this is being replied to but so you know i fucked it😂😂😂
@@MAN_FROM_BEYOND if you had to say how well you did, how bad would you say you fucked it
What's YOUR NAME?
@@ziponomics Was the QUESTION answerable? THE QUESTION that WAS asked. Has it been slaved ANYONE CAN CREATE A PHYSICS QUESTION. IS THERE AN ANSWER? YES OR NO? IF SO I CAN UNDERSTAND IT BEING ON A TEST. IF NOT. HMMMMM.
Amazing explanations !!!
Can You please add past paper solutions ? like the ones for CIE a levels
and can you please add videos on practical papers like p3 , p5 in cie a levels
Thanx
DO YOU REMEMBER WHEN THE MOVIE STARS WERE PAYING FOR GRADES FROM HARVARD. I DIDN'T GET WHY THE PEOPLE INVOLVED WHERE GOING TO JAIL. FK.... THAT SIT THERE ASS DOWN IN FRONT OF AMERICA AND MAKE THEM TAKE THE TEST. IN MY OPINION THAT WOULD BE PUNISHMENT ENUF. THEY WOULD LAFFFFFFC THERE ASS OFF.
Past paper solutions? Do you mean playgerise. Sorry I won't still someone's idea and pawn it off as my own. That would never happen. I don't want to be the Laphing stalk of the century like your goofy ass movie stars. Stars yeah right!
My papers?
Solutions. Okay
Great revision thank you i am currently preparing for the october exams
Thank you! You're a really really good teacher!
Please do Field strength and potential graph!
I do CIE A-level physics 9702, the graphs are a bit tricky. For eg- max speed in potential graphs.
Great videos! Please could you add Kepler's laws?
How would you work out the speed of the particle moving in the field?
Thank you for this video! Can you make a video for which quantities are scalars and vectors?
For energy, field strength and potential, of multiple charges or masses, there are some trigonometry involved too, so I was quite confused.
Thank you so much!
Wow that was really useful, thank you so much!
could you add in the effects of sparking at the surface of a sphere as well? there are so many repeated questions on it and I don't get it... You're videos help a lot. Keep doing what you do. Cheers :)
Hi, thanks for the video. I have a question. How come the work done in moving a particular charge is not scaled by -1/2 when integrating the coulomb force equation with respect to distance form the charged particle? I thought that E = f * delta(x) is only apllicable for a constant force? Thanks for your help (anyone who responds).
Thank you so much! Had a hard time understanding from my prof.
where did you end up?
Love your videos, absolutely life saver! I was just wondering though, when you kept saying ‘potential’ what did you mean exactly? Like, did you mean the Potential Difference? Or Potential Energy?
Steven Pham I’m assuming he meant potential energy but I think he explained in the vid how they are pretty much the same thing
When adding up the potentials with different sources of electric fields, why are they not vector quantities? Is it because we are looking at the energy potential which is not a vector, its just a bit counter intuitive.
Interesting! Work done is Fr when the force is constant. As you do work against a gravitational field the force decreases. Wouldn't it be better to integrate F wrt r? That would also give a - sign that seems to be left out?
This concept only crops up in the form of Fr graphs at A-level, and you find the area under the graph to find work done. Integration is no longer required.
Can f=eq be used for both radial and uniform fields?
I haven’t done questions on this but I feel like it will be painful 😖
It is
Can the electric potential be substituted for mass thus negating the gravitational force?
These are amazing thank you
Thank you so much! Love the explanations :)
Hi Eleanor Peng
Are you able to do a video on the exponential curve to do with temperature decrease, my teacher briefly went through it today but I don’t get it
It's just like radioactive decay, but instead of rate of decay decreasing with nuclei, it's rate of energy loss decreasing with thermal energy.
thank you for your great video but I am abit confused because why do you need external energy to bring a object from infinity to a certain point if gravity is attractive
I have to ask, do you speak whilst actually writing or do you do it as a voice over afterwards? Love your vids btw.
This one? Both at same time.
You're the best man🔥
Thanks,Mr Rees!
For the electric potential at around the 8:00 point, wouldn't the equation change depending on whether the test charge and main charge were the same charges or different. If the test charge were + and the main charge was + then the potentials would start at a maximum at the surface of the main charge and decrease to 0JC-1 as work is done by the field to repel the +test charge so it would loose energy.
Many thanks
Yes - I wish I had explained that in the video!
can you add some videos on aqa a level astrophysics optional unit
RHYS GRIFFITHS
We do medical physics tho...
...and we do astro? what's your point lool
J K1NG Lmao wtf haha
Lucky people, we have to do turning points :(
@@ps0m362 ouch
Is there any chance of some medical physics vids before the exam? Don’t know how I’m gonna revise without these vids 😅😅
Paper starts shaking but the 4 stays still (9:16)😂😂 And then 10:41
Drawing equipotential lines and dielectrics?
So educative sir
Could you pls make a video on hall's effect . It is really confusing chapter, all of us are having a problem with it. Thank you
Hello sir, I was answering a question regarding gravitational potential energy and the gpe was negative and not positive. Why might this be the case? I got the answer right but the opposite sign is unclear.
Genuinely appreciate these videos so much, thankyou!
That 4 and 2 acting upon gravity 😂
Anyone here for 2022 Exam Prep!!
Yep
At 16:18 I don’t understand how that works and why in the first place you would do this calculation?
Hello, I have an exam Q that says g is proportional to a body’s density and its radius but I thought it was /r squared. It says to multiply the density and radius to find the highest number that then equals the greatest g. Is this wrong? Help!!
Can u pls do a video on questions of Mechanics 🥺🥂that would be a great help ❤️
thank youuu so much!!
can you do a video on stationary satellites, thanks. Awesome teacher btw!
Geostationary satellites have a time period of 24 hours and are launched from the equator to an elliptical parking orbit where it remains in a fixed position, amplifying uplinks to downlinks across different parts of the world for live transmissions etc
Love this....❤️
Super useful
Will you be doing a2 videos?
+EradicationX | Today This is A2...
facepalm
Hi, how do you calculate the distance R1 between Mass1 and the point where force is zero if you have M2 and the distance between M1 and M2 given?
Hi hope I can pop in and help 😊
If force at that point is zero, it means that the grav. attractive forces M1 and M2 exert at that point are equal and opposite.
Distance M1 to the point = R1
So distance M2 to the point = total distance - R1
If we equal the grav force equations for both M1 and M2 at mass m at that point we get:
GM1m/R1^2 = GM2m/(total distance - R1) ^2
Constant G and small mass m cancel, so we rearrange and get:
M2/M1 = (total distance - R1)^2/ R1^2
Square root to cancel the squares and rearrange for R1.
@@jewelbacani Thankyou!
thanks, sir.
for aqa are we not ment to do kepler's laws ?
Only 3rd law.
legend
whats the difference between potential and potential energy?
One is J, the other is J/kg :)
If energy is scalar then how can it be negative ?
so the gravitational field strength is less on me if I am at the top of a really tall mountain?
If s, why is it a constant?
As relative to the radius of the Earth the increase in your r will be negligible. So the change in g is negligible. g=9.81 at the surface of earth - it is not a consent we just treat it as one as in almost all cases in GCSE and A-level the change in r is so small relative to the radius of the earth it doesn't effect g. G is a constant however.
v useful thank you
Can you add some more paper please?
16:17 why is total v = equal to the sum of potentials?
Please tell me after one year you managed to find the answer
I cannot find any explanation
Awesome 🎉❤
im on here 1 hour before my exam good luck people
good luck me too ;D
Same, good luck
I could smell the coffee breath through the screen
I hate coffee 😂
When you're going over the graph at 11:16 shouldn't the gradient just be g, since thats change in y over change in x, don't really understand how its g/E.
It's not g divided by E, it's *either* g *or* E, for two different graphs.
oh nice, cheers
how do you work out resultant electric field strength between two particles
Subtract them! Careful with + and -.
@@ScienceShorts thank you
damn damn damn. amazing sir
Sir, can you please xplain 13.35 for me.. It will be a great favor.
When go through the earths surface the mass of the earth M can no longer be thought about so much as a point source, as the mass of the earth (for sake of simplicity at a level) we say is evenly distributed in the earths volume. Giving it a constant density. When the object which g is acting on is moving through inside of the earth this mass is now acting on it from multiple directions. When the object reaches the centre of the earth all the mass is evenly in every direction around the object and so the resultant force due to this mass is 0. Whilst moving away from this point g in relation to r becomes proportional, until your outside the earths surface when all the mass acts from the apparent point mass the relation of g to r is an inverse square relation.
3:21
Wicked!
Doesn't this imply that gravity can be measured in kg per meter squared?
my brudda
neeed more
What a guy.
Now where do these equations break down, its cool seeing them work, but Im more interested in seeing where they fail catastrophically.
Chaos black hole
near black holes
How do u find escape velocity from a planet
GPE = KE
thats a greaaaaaaaat video
hey science shorts. great videos. in that last part of the video about the sum of potentials, i believe you forgot to mention that the potentials must be on the same plane...otherwise we must resolve on one plane and then add
need more
Escape Velocity??????
to the distance aaaah?
i love u sir
Can someone explain why potential cannot be zero?
At infinite distance, it is 0. Since you can never be at an infinite distance, potential is always negative
Paper 2 mock tomorrow 10hrs 45min to go...
still have Capacitance and B-Fields to do 🤢🤮
omg legend
I got my A Level in 10 hours should I go to sleep??????
Aditya Misra aaayy last minute cramming club
maddie moo 😂😂😂 I’m not going to sleep until 3 AM. I’ve literally been only doing economics revision!
@@adityamisra8869 oh no u poor thing, did it go okay for you??
maddie moo it was alright paper 1 was easier for me. I do AQA
Wow.
Had to pay real careful attention to your r's! They look too much like V's
Last minute revision SQUAD!!! reply how u found paper 1
neither good nor bad
@@chinmayvashishtha the perfect answer I hated everything to do on Waves lol
I am o level student so please I request you give me more information about o level and a level
Google it