Register to reply

Find charge due to two particles

by StephenDoty
Tags: charge, particles
Share this thread:
StephenDoty
#1
Aug30-08, 06:42 PM
P: 267
Suppose that the magnitude of the charge on the yellow sphere is determined to be 2q and at (d2cos(theta), -d2cos(theta). Calculate the charge q_red on the red sphere at (d1,0) with a positive blue sphere,q, at the origin and whose net force,F, is in the direction of -y. The yellow sphere is negative and the red sphere is positive. ( See picture bellow)
Express your answer in terms of q, d1,d2, and theta.

Well the Fx on blue due to the yellow sphere= k(2q)(q)/(d2cos(theta))^2
and the Fx on blue due to the red sphere = - k(q_red)(q)/(d1)^2

Now what? I am unsure as to what to do now. Any help would be appreciated.

Thank you.
Stephen

Phys.Org News Partner Science news on Phys.org
New type of solar concentrator desn't block the view
Researchers demonstrate ultra low-field nuclear magnetic resonance using Earth's magnetic field
Asian inventions dominate energy storage systems
StephenDoty
#2
Aug30-08, 07:08 PM
P: 267
Would you set them equal to each other?
nova-ex
#3
Aug30-08, 08:37 PM
P: 15
I would? because of the fact that there is no net force along the x axis. Hence all x components of the force must cancel out to equal 0. Do you not get the right answer by doing that?

StephenDoty
#4
Aug31-08, 02:51 AM
P: 267
Find charge due to two particles

I set them equal to each other and solved for q_red and got:

q_red= 2qd1^2/(d2^2)(cos(theta)^2)

Did I set up the original equations correctly? And did I find q_red correctly in terms of q, d1,d2, and theta?

Thank you. I really appreciate the help.

Stephen
StephenDoty
#5
Aug31-08, 05:55 PM
P: 267
I have to turn this in soon so any help would be appreciated.

thank you.

Stephen
nova-ex
#6
Aug31-08, 09:47 PM
P: 15
I don't see anything wrong with it. Does anyone else see anything wrong with it?
StephenDoty
#7
Sep1-08, 03:49 PM
P: 267
bump
Does everyone agree with nova-ex? Are my equations correct?
StephenDoty
#8
Sep1-08, 08:35 PM
P: 267
Not to be a bother but I have to turn this in tomorrow. So if you can please tell me whether or not I set the problem up correctly and got the correct formula for q_red: q_red= 2qd1^2/[(d2cos(theta))^2]?

Thanks I would really appreciate it.

Stephen
StephenDoty
#9
Sep2-08, 12:16 AM
P: 267
Any opinions????


Register to reply

Related Discussions
2 Electric Charge Particles w/ acceleration? Introductory Physics Homework 7
Particles and charge Introductory Physics Homework 10
What is charge? Why do fundamental particles possess it? High Energy, Nuclear, Particle Physics 8
A charge falls from infinity to within r of another charge, find velocity. Introductory Physics Homework 1
When is a particles charge spread out? Quantum Physics 9