• Support PF! Buy your school textbooks, materials and every day products Here!

Electric Potential - Work: Negative or Positive

  • Thread starter Peter G.
  • Start date
  • #1
442
0
Hi guys,

So, these two formulas are making me very confused:

UE=kQq/r

ΔUE=-WE

Ok, here is the problem:

Let's imagine that we have two positive charges. One of them is static, the other one can move.

If we place the positive charge close to the source charge, the movable positive charge will be repelled, that is, the source charge will be doing work on it. However, as it moves away, its Potential energy decreases. How can work be done on something and that same object lose energy?

Thanks!
 

Answers and Replies

  • #2
6,054
390
It does not lose energy. It exchanges its potential energy for its kinetic energy.
 

Related Threads on Electric Potential - Work: Negative or Positive

  • Last Post
Replies
4
Views
8K
  • Last Post
Replies
3
Views
3K
Replies
2
Views
6K
Replies
3
Views
7K
Replies
6
Views
4K
  • Last Post
Replies
4
Views
12K
  • Last Post
Replies
2
Views
2K
Replies
1
Views
2K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
5
Views
22K
Top