Solving Coulomb's Law Homework Problem

  • Thread starter Thread starter lucer95
  • Start date Start date
  • Tags Tags
    Coulomb's law Law
Click For Summary
The discussion focuses on a homework problem involving Coulomb's Law, where the user struggles with vector addition and calculating forces between charges. The problem requires determining the force on a 1.0 nC charge due to two other charges, 2.0 nC and -2.0 nC, with a specified distance of 1.0 cm. The user has identified the charges and applied the Coulomb's Law formula but is confused about incorporating angles and the magnitude of the forces, leading to unexpectedly large results. Clarification on vector addition and the correct application of Coulomb's Law is needed to solve the problem accurately. Understanding these concepts is essential for successfully completing the assignment.
lucer95
Messages
2
Reaction score
0

Homework Statement


Having trouble with my vector addition when it comes to this homework question. Not really sure how to go about solving this problem since I'm new to coulomb's law problems and my prof didnt really give us many examples in class. Here is the picture of the charges. The question asks:
A)What is the force F⃗ on the 1.0 nC charge and Determine the magnitude of the force F.
B)Determine the direction of the force F⃗ .
Assume that +x axis is directed from the 2.0 nC charge to the -2.0 nC charge





Homework Equations


eqn for coulomb's F=K(q1)(q2)/r^2 K=9.0x10^9

I named q1=-2.0nC=-2.0X10^-9 C
q2=2.0nC=2.0X10^-9 C
q3=1.0nC=1.0X10^-9 C




The Attempt at a Solution


I tried doing the action reaction force of F(1on2) but not sure what to do with the angles and also not sure if my answers make sense since i was getting very large answers.
 

Attachments

  • Untitled.png
    Untitled.png
    3.6 KB · Views: 370
Physics news on Phys.org
Should also mention r=1.0cm=0.01m
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
View full post »

Similar threads

Dependence of Coulomb's law on the medium
  • · Replies 8 ·
Replies
8
Views
3K
Calculate electric force using Coulomb's law (vector components are the struggle)
  • · Replies 3 ·
Replies
3
Views
1K
Possible variables for Coulombs Law?
  • · Replies 5 ·
Replies
5
Views
2K
Component Force on a 1.0 nC Charge
  • · Replies 2 ·
Replies
2
Views
10K
Coulomb's law; vector form problem
  • · Replies 1 ·
Replies
1
Views
3K
Coulomb's Law in 3D: Find Electric Force & Field
  • · Replies 2 ·
Replies
2
Views
3K
Three particles, finding Q of one of them (Coulomb's Law)
  • · Replies 3 ·
Replies
3
Views
2K
Coulomb's law vs Electric Field
  • · Replies 12 ·
Replies
12
Views
5K
How to find distance between 2 charges, with no force given?
  • · Replies 2 ·
Replies
2
Views
2K
Calculating Charge and Force Using Coulomb's Law and Trigonometry
  • · Replies 6 ·
Replies
6
Views
8K