2BPreLec

Since the gravitational force is a conservative force

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: al energy. Since the gravitational force is a conservative force, the work I put into the mass is equivalent to the increase in its gravitational potential energy. Electric Potential Energy The electric potential energy, Ue, for point charges (or spherically symmetric charge distributions) is: Ue = ke q1 q2 r where zero potential energy was defined as having a separation distance of infinity. Electric Potential Energy As with all potential energy, it is far more useful to look at changes in electric potential energy as o pposed to absolute electric potential energy. For a point charge, the change in potential energy between points A and B is given by: q1 q2 q1 q2 ∆Ue,A→B = Ue,B − Ue,A = ke − kE ￿ r B ￿ rA 1 1 ∆Ue,A→B = ke q1 q2 − rB rA Note the lack of absolute value signs. The sign of the...
View Full Document

Ask a homework question - tutors are online