Welcome :: Homework Help and Answers :: Mathskey.com
Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

13,435 questions

17,804 answers

1,438 comments

127,411 users

Physics Homework Help?

0 votes

Three equal point charges, each with charge 1.95 uC, are placed at the vertices of an equilateral triangle whose sides are of length 0.250 m.  What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)

asked Feb 13, 2016 in PHYSICS by anonymous

1 Answer

0 votes

Three equal point charges, each with charge is image.

Point charges are placed at the vertices of an equilateral triangle with side length is image.

The potential energy between two charges is image, where image is the coulombs law constant image.

Since it is an equalateral triangle, three point charges are placed at equal distances.

The total potential energy of the system is image.

Substitute image, image and image.

image

image

image

image.

The total potential energy of the system is image.

answered Feb 13, 2016 by Sammi Mentor
edited Feb 13, 2016 by steve

Related questions

...