nagle_phys2020_fa07_lecture3

nagle_phys2020_fa07_lecture3 - 1) 2) 3) 4) Electric charge...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 41 1) Electric charge comes as (+) and (-) 2) Objects in nature have charge +e or -e 3) Unlike charges attract, like charges repel 4) Electric charge is conserved These are experimental facts. Why are they true? We do not know. People studying string theory for example are trying to understand these facts at a deeper level. Reminder – CAPA Homework due today at 11 pm - Electrostatistics Prelab/Lab for next week - Monday’s section will meet Wednesday at 8 am ! - CAPA Assignment #2 is available (note that for CAPA #2 it will enforce 4 try limit). 42 2 2 1 | | r Q Q k F = v Recall that forces are vectors . Thus, they have magnitude and direction . Coulomb's force acts along the line between the two objects. If we have multiple charges, we must add the forces together as vectors . 43 2 2 1 r Q Q k F = v In many cases (like this), we use the equation to get the magnitude, and then use the rule to get the direction (opposites attract, likes repel). 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/27/2008 for the course PHYS 2020 taught by Professor Dubson during the Fall '06 term at Colorado.

Page1 / 3

nagle_phys2020_fa07_lecture3 - 1) 2) 3) 4) Electric charge...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online