Coulomb's Law Problems

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Күн бұрын

Physics Ninja looks at 2 Coulomb's Law problems involving 3 point charges. We apply Coulomb's Law to find the net force acting on one of the charges. In the first problem the charges lie along the same axis and in the second problem they form a triangle.

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@weapons_check 5 ай бұрын

This literally helped me more than my actual physics teacher Tysm!

@qudhachure9598 2 жыл бұрын

by this video, you earned my subscription your awesome mate.

@cara.bella15 Жыл бұрын

Literally godsent video, thank you!!

@hawadrammeh8870 3 жыл бұрын

Awesome video, thank you so much!

@imsengky Жыл бұрын

Thank you so much, sir.

@steves1015 Жыл бұрын

Nice video and you explained well. Just a minor point, it is a bit confusing when you say that when calculating F1 or F2 you don't need to worry if it is positive or negative because that just tells you the direction. Then later you say that the positive or negative for Fnet tells you the direction. I think it would be clearer to say that the negative or positive for the F1 or F2 indicates an attraction or repulsion. The positive or negative when calculating Fnet would indicate direction, left or right.

@APerson-ry2ce 2 жыл бұрын

Thank you so much sir 👍👍👍

@thameral7rbi 11 ай бұрын

thank you very much, I've watched several videos, yours was the best.

@PhysicsNinja 11 ай бұрын

Wow, thanks!

@anastasia2291 Жыл бұрын

Very good explanation, thank you, you make me understand

@pitfall0121 3 жыл бұрын

Thank you for this video!

@jaganmayeesahoo4210 3 жыл бұрын

Thank you ADMIN.# love from India

@amanuelendalkachew2499 4 ай бұрын

thank you for your clear explanation .from Ethiopia

@zewditukergo7951 3 ай бұрын

Are you from ethiopia? Nice to meet you

@zewditukergo7951 3 ай бұрын

Are you grade 11

@zewditukergo7951 3 ай бұрын

fool

@syedhunainali7663 3 жыл бұрын

why you take nagitive sign on net force of x component

@anwynanimations7207 2 жыл бұрын

Amazing, thank you!

@quakinaspens 9 ай бұрын

in the second problem after finding the angle 71, do we have to find the reference angle since it is in the second quadrant ?

@manraaj7409 4 ай бұрын

i think its better to give a reference, to confirm the direction

@mrchocolatebean8878 5 ай бұрын

thanks a lot man

@marriamhaji7440 4 ай бұрын

Thank you so much ♥️

@user-fz3zt7dd3d 11 ай бұрын

Thank you sir

@galagarcrizelm.2226 3 жыл бұрын

Thankyouuuuuuuuuuuu so muchhhh

@Sattamsager Жыл бұрын

Thank you so much this helped me so much

@marekamoorosi7565 Жыл бұрын

You the best sir💞💞 Was lost but now am focused 💪

@ARTDEVGRU247 9 ай бұрын

are you found?haha

@bohlalenchabeleng1370 Жыл бұрын

Thank you.

@maxbingen8773 3 жыл бұрын

THANK YOU

@christopheravila7989 3 жыл бұрын

How do you locate q3 given 3charges and d between q1/q2 So far no one in any video has answered this, tired of net forces or magnitude

@carultch 2 жыл бұрын

It would help to see a time link for what example in the video you are asking about. q3 could be anywhere relative to q1 and q2, depending on how we specify it. You might ask, where can we place q3, so that the net force on it due to q1 and q2 is zero? Given q1 on the left and q2 on the right. In which case, you'd set up a generalized equation for the force on q3, along the axis of q1 and q2. You'd then identify three regions (left of q1, between q1 and q2, and right of q2), and develop an equation for the force on q3 in each of these regions. By inspection, you can rule out regions where the force on q3 could not equal zero. For instance, if q1 and q2 are opposite signs, then we know the force on q3 can't be zero between them, so we can rule out that region. If q1 > q2, then we know the force on q3 can't be zero to the left of q1. This leaves only one region (right of q2), where there could be a zero force point, to place q3.

@ravenousstrike012 5 ай бұрын

Thank you and this will be very helpful for my future tests and topics in Physics 2: Electromagnetic Waves❤! But i have a question, what is the exact value of 1Coulomb? It is 6.241x10^18 or either +/- 1.6x10^-19? I'm really confused that i cannot make progress about this problem. And also, if for example there's 2C, should i also multiply it by 2 on either of those 2 on my first question? The answer i get if there's only number of charges instead the value of C is on scientific notation and higher numbers that isn't I expected. Anyway thanks again for these!

@zewditukergo7951 3 ай бұрын

Bruh, colomb is scalar. so we never use negative sign for that.

@mahletmekuria144 Жыл бұрын

Awesome vido i really say thank u

@sholaibukun1352 2 жыл бұрын

Sir, From my calculation the force on q1q3 is0.66N pls do a check Thanks

@jpmcfrosty Жыл бұрын

Followed this ex down to a tee and its saying my Net Force value is wrong, not sure what else to do. Only difference in my problem is that my q2 is positive and my q3 is negative and it wants my answer in mN's not N. Have walked through 3 different tutors now and none of them we're able to come to the same conclusion. not sure what else to do...

@rubyanneinto49 5 ай бұрын

On the first problem, was it supposed to be 0.135 instead of 1.35 N?

@punsarawithanage3840 2 жыл бұрын

Superb one ❤️ from Sri Lanka 🇱🇰

@amarakhan2192 Жыл бұрын

Why the direction of F2 is towards positive charge? It should be outwards.

@rachelhiltystudenthbhs2575 10 ай бұрын

great explanation! thanks for saving my grade

@ahmedomar9804 2 жыл бұрын

Thank you, sir.

@redjinn999devil2 10 ай бұрын

thank you your 100th comment on this vid love from Pakistan 💓

@PhysicsNinja 10 ай бұрын

You rock!

@zewditukergo7951 3 ай бұрын

@@PhysicsNinja How

@cyrus2857 Жыл бұрын

fantastic

@Decoy22x 3 жыл бұрын

i wish my hw this easy

@mathias1116 2 жыл бұрын

Me to😢

@salynt1126 2 жыл бұрын

me three😥

@ShitThatsMyn 2 жыл бұрын

It's like watchmaking. Cheap, mainstream ones are easy to replicate. While expensive ones require craftsmanship and many complications. By having many complications in your homework your professor is building an expensive, luxurious brains. XD

@overl0ad816 Жыл бұрын

@@ShitThatsMyn in which 50% will forget in a year and 95% in 5😂

@alieusenghore4758 Жыл бұрын

sameee

@splashmoney2337 11 ай бұрын

thank you, u saved my life for the diagnostic test tomorrow.

@PhysicsNinja 11 ай бұрын

Glad I could help

@zewditukergo7951 3 ай бұрын

bruh. Also for my **** exam it helps a lot❤❤

@iiStayFlyx5 2 жыл бұрын

hello, im having trouble figuring out when to use sin and cos when solving for f1x in coulombs law, the trig is messing me up. why did you use cos

@sameerasif5302 2 жыл бұрын

Hi, I think cos is used on the line where theta is, and sin is used on the line perpendicular to that.

@thefirsthandleonyoutube 2 жыл бұрын

Basically (cos) is used when your closing the angle. Like if the angle is on the y-axis, then you use (cos) with respect to the y-axis and (sin) with respect to the x-axis. And vise versa. Hope you understand and it helps.

@jakeisrich Жыл бұрын

Why is did you disregard the sign in 11:12? isn't q3 supposed to be -2x10^6

@laurentiuslancaster1657 9 күн бұрын

Is it explained why he uses Tan at 13:50 specifically?

@Aboodinho. Жыл бұрын

I am the one who should thank you actually ♥

@szxnv 5 ай бұрын

he's the goat

@Patrick-kickass 3 жыл бұрын

Very good!

@Ghost-hv2bi 2 жыл бұрын

Thanks u helped my a lot 😅

@ebukaugwu1684 3 жыл бұрын

great work

@maxima4116 2 жыл бұрын

Thank you for this example! One ques, at 19:09 when computing for the angle, why didn't you include the negative sign for 0.39

@brucejohnson5786 2 жыл бұрын

because its squared anyway, it wont matter if its negative or positive

@crankmusicofficial 2 жыл бұрын

The formula is actually on Absolute value. Tan-1 multiplied to the absolute value of Y/X

@carultch 2 жыл бұрын

@@crankmusicofficial You actually need the atan2 function to fully resolve x and y coordinates as an angle, which is common for computer programs. Without the atan2 function, you need to identify the quadrant by considering both the signs on x and y, and add 180 degrees if the sign on x is negative. The atan2 function takes in both x and y, and considers the sign on both of them, to resolve the angle and quadrant.

@allyssacorral846 Жыл бұрын

Why is it -6?

@kamilamohamed284 2 жыл бұрын

Can u do it again the second problem please

@daryldadizon5485 Жыл бұрын

question why u write -0.2 in calculation of F1y but the given is 0.20?

@PhysicsNinja Жыл бұрын

Because that component of the force is pointing down and i've called that the negative direction.

@lekanfabiyi3363 Жыл бұрын

Merci

@letsileutlwang2456 2 жыл бұрын

Thanks. But just to clarify, the alpha should be 71.3.

@toitozky155 Жыл бұрын

don't approximate the number

@en.muhammad6882 3 жыл бұрын

The last parts of the second problem weren't clear enough Why did break the force into components?

@ahmedomar9804 2 жыл бұрын

You need to break into components because it consists of horizontal rise and vertical as gradient I.e. it is not fully vertical or horizontal - it's between them. This shows you that, it consists of vertical and horizontal line which you will need to find each of them. Another thing that can show you it consists of two components, It's like hypotenuse which is found by using the horizontal and vertical lines. Hope you'll get it.

@en.muhammad6882 2 жыл бұрын

@@ahmedomar9804 Thank you alot Ahmed for the reply... even though I don't need physics anymore but it was helpful for a further knowledge thanks again.

@ahmedomar9804 2 жыл бұрын

@@en.muhammad6882 You are welcome. 🖐

@jbonceu2457 3 жыл бұрын

Just wanna clarify, if it's a negative charge, do you require to put negative sign on the process or not?

@ahmedomar9804 2 жыл бұрын

No, you don't need. The negative sign just shows you that the charge you have is a negative charge. But if it is force, the negative sign shows you the direction of the force.

@frazebean5117 Жыл бұрын

Don't put negative sign on the process as it just defines the direction.

@joanad1246 Жыл бұрын

Earned a subscriber thx❤

@PhysicsNinja Жыл бұрын

Thanks for your support!

@wamakaghambi4477 Жыл бұрын

wow this is really a good work

@user-fi5rx4do5o 8 ай бұрын

Can you add a video on charges forming equilateral and how to find the magnitude and direction of the force of one of the vertex of the triangle.

@EYEBALLKLOTT Жыл бұрын

Thank you for telling

@keolebogileseepamooka0169 3 жыл бұрын

I don't understand the part where you are explaining the constant (k)

@carultch 2 жыл бұрын

It's a universal constant that we experimentally determine. It has a value you can look up, which is about 9*10^9 Newton-meters^2/Coulomb^2. Coulomb experimentally determined this constant, in a similar manner as Cavendish determined the Big G of gravity, and hence became the namesake of this law and the unit of charge. You may see it written as 1/(4*pi*epsilon0), to relate it to Gauss's law, in which case epsilon0 is the experimentally measured constant that directly depends on the Coulomb constant K. This way, 4*pi*r^2, the surface area of the sphere of influence, appears in the denominator.

@AmareGebeyaw-kp3ih Жыл бұрын

Way q3 came to between q1 and q2 not understand you says please

@richardferre1253 2 жыл бұрын

but why do we do the vector and angle thing

@PhysicsNinja 2 жыл бұрын

unfortunately you have no choice the forces are vectors which have a length and a direction and you might need to add several vectors together. This will require some vector algebra.

@richardferre1253 2 жыл бұрын

@@PhysicsNinja yep that hurts me Ahah but why do we do it in this case, like what is a vector and when do we use it

@brandongarcia8244 2 жыл бұрын

For the second question what happened to the 0.44N?

@roeal-wazeer3135 2 жыл бұрын

he used it to calculate the x and y components of that force, then used those calculated components to find the net force

@kowh262 2 жыл бұрын

You did a good job cutie

@user-hu1xv2of2t 6 ай бұрын

You should start from the questions not just from diagrams please

@zewditukergo7951 3 ай бұрын

There is enough given to solve the problem on the diagram.

@Hanan-pe4hh 3 жыл бұрын

Find the.distance between two spheres one -3.0x10 race to -5 and the other -2.5x10race to -4 ,if the electric force is 1.0N

@Hanan-pe4hh 3 жыл бұрын

What means electric force?

@ahmedomar9804 2 жыл бұрын

r=7.35m

@ahmedomar9804 2 жыл бұрын

@@Hanan-pe4hh Electric force is the force acted on a charge by another of like(same) or unlike ( different) charge(s).

@arcadiana-jan-causin5421 6 ай бұрын

can anyone enlighten me why 1.35N when i got her 1,350?

@al-edrisy1129 Жыл бұрын

Sorry , can some one tell me in the first problem why F21 = 135N Because I fund it 0.135N

@rubyanneinto49 5 ай бұрын

I knew it😅😅

@rubyanneinto49 5 ай бұрын

I also got the same answer😅

@jeseniafilpo9938 Жыл бұрын

🥰🥰🥰

@louistaboada964 4 ай бұрын

pls help im stuck at the part where 0.2 over 0.4 is equal to 1/2, explaination?

@daph_di. 3 ай бұрын

0.2 / 2 = 0.1 ; 0.4/2 = 0.2 so 0.1/0.2 is the same as 1/2 it’s the same ratio

@xiaos3198 Жыл бұрын

wait. how did you know that there are 2 forces acting on y direction?

@EYEBALLKLOTT Жыл бұрын

We're dealing with far more than microcool. He and we at this House are dealing with every fitted label and price setter. That's Android policy you're taking about. So I have shopped for this house and receipts were sent out I expect. It also has a limited right to ERR within it's space as the state lottery stays next door. Our house may clip some hedges and it's height is as high as federalist access goes. In our practical lives here, we don't all do this. I do. I'm the fence keeper here and it is a house Paul. So let's just say it has a soft underbelly as an opportunity to prove youre A: capable of outlining a property's edges. You know what that is and you can be found at the door. B: You're safe being trusted to stand in C: You're a stay put homebody D:You'd kick instead of shoot E: You'd Enterprises F: you'd find treasures in the dirt on ground G: has no right this high up.