Register to reply 
Force of 2 Point Charges 
Share this thread: 
#1
Jul406, 04:52 PM

P: 16

I've been working on the following problem but when I try my answer online, it keeps coming up as incorrect. A charge Q1=9.4 C is 4.8 m from a charge Q2 = 3.6 C. What is the magnitude of the electrostatic force on Q1?
I'm pretty sure for this its just Coulomb's Law so: F = (k(Q1*Q2))/r^2 F = ((8.9876*10^9)(9.4*3.6))(4.8^2) F ~ 1.32 * 10^10 N Taking into account sig. figs, my final answer is 1.3*10^10 N. \ However, this keeps coming up as incorrect. Am I overlooking something? Thanks in advance for the help! 


#2
Jul406, 05:01 PM

Sci Advisor
HW Helper
P: 2,954

Patrick 


#3
Jul406, 05:09 PM

P: 16

Yep, I just looked it over again and all charges are given in Coulomb's. I think I might email my professor to see if he can look it over. Perhaps its a bug in the online grading system? I'm fairly confident in my answer. Thanks for looking it over!



#4
Jul406, 05:11 PM

Sci Advisor
HW Helper
P: 2,954

Force of 2 Point Charges
Best luck! Patrick 


Register to reply 
Related Discussions  
Two point charges, Zero Net Force  Introductory Physics Homework  14  
Involves magnetic force and point charges with constant velocity.  Introductory Physics Homework  2  
Point charges  Introductory Physics Homework  3  
Point Charges  Introductory Physics Homework  2  
PE from point charges  Introductory Physics Homework  1 