Coulomb's Law Question grade 12

AI Thread Summary
The discussion revolves around calculating the magnitude of a third negative charge, q₃, in a system with two other negative charges, q₁ and q₂, arranged at the corners of a square. The forces acting on q₁ are given, with a specific direction of +20.0° relative to the +x axis. The user has applied Coulomb's Law to express the forces exerted by q₁ and q₂ on q₃ as functions of q₃. However, they are uncertain about the next steps to solve for q₃. Assistance is requested to proceed with the calculations.
jbjohnybaker
Messages
19
Reaction score
0

Homework Statement



Three point charges, q₁= -5.00 μC, q₂= -4.00 μC, and q₃ which is negative are arranged as shown on three corner of side a=0.500 m. The direction of the forces on q₁ is at +20.0° with respect to the + x axis. Calculate the magnitude of q₃. The diagram looks something like this:
---------(-) q2
| (square) |
| (square) |
| (square) |
(+)------(-) q3
q1

Homework Equations



F = kq1q2
------
r^2

The Attempt at a Solution


I used the above formula and I put q3 as a variable. I found the two forces, the first one which is what q1 exerts on q3 and the second which is what q2 exerts on q3:

F(1 on 3) = 1.69 X 10^5 x (q3)
F (2 on 3) = 1.44 x 10^5 x (q3)

But then I'm stuck...
 
Physics news on Phys.org
Anyone?
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Trying to understand the logic behind adding vectors with an angle between them'

Thread 'Trying to understand the logic behind adding vectors with an angle between them'

My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
View full post »

Similar threads

Calculate electric force using Coulomb's law (vector components are the struggle)
Replies
3
Views
1K
How to find distance between 2 charges, with no force given?
Replies
2
Views
2K
Three charges located on a straight line
Replies
7
Views
9K
Coulomb's law three points on a line
Replies
1
Views
2K
Electric charge and force question
Replies
1
Views
1K
Coulomb's law; vector form problem
Replies
1
Views
3K
Coulomb's Law in Two Dimensions
Replies
4
Views
4K
SPH4U University Grade 12 Physics - Coulomb's Law?
Replies
1
Views
3K
Coulomb's Law, finding acceleration direction
Replies
3
Views
2K
Calculating Two Unknown Charges from a Tripole
Replies
3
Views
4K

Hot Threads

Recent Insights

Back
Top