Electric charge, simple problem for most of you.

  • Thread starter Fishingaxe
  • Start date
  • #1
86
0

Homework Statement



A) Two electric charges each with the charge of -35 nC is 0.70m apart from each other. With how big of a force do they impact each other?

B) A small metallic ball has a positive charge of 25nC. A particle with the charge +2.0nC is affected by a repellent force that's caused of the metallic ball. At what distance is the force of the ball 60 µN.


Homework Equations





The Attempt at a Solution



I'd really love some clues or perhaps links to equations that are relevant to these types of problems. I've a hard time imagining that these problems are hard once you know the relevant equations since this is the most basic physics there is.
 

Answers and Replies

  • #2
662
307
Google coulomb's law.
 
  • #5
86
0
Is this correct? F = q1*q2 / r^2 = -35*-35/0.49 = 2500?

And if so, what is the power measured in?
 

Related Threads on Electric charge, simple problem for most of you.

  • Last Post
Replies
2
Views
4K
  • Last Post
Replies
5
Views
1K
Replies
6
Views
7K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
4
Views
9K
  • Last Post
Replies
1
Views
985
  • Last Post
Replies
1
Views
1K
Replies
14
Views
3K
  • Last Post
Replies
1
Views
1K
Top