P219lecture02electricforce

# P219lecture02electricforce - Goal To understand what...

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Goal: To understand what electric force is and how to calculate it. Objectives: 1) Understanding how to translate electric field to force 2) Understand how to calculate Electric forces 3) Knowing what Electric Field lines are and how to use them 4) Understanding motions of a charged particle in a constant electric field.

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Yesterday: We learned that the Electric field is a topography of electric charges around you. At any point the electric field is just a sum of the topography from each charge. For each charge E = -qk / r 2 How would this translate to a force?
Ball downhill If you have a gravitational topography a ball will want to roll downhill. That is it will roll from a high elevation to a low one or a high field to a low one. The same is true of electric fields. A positive charge will want to move to a lower electric field. A negative charge will do the opposite and will want to move up to a higher valued electric field (moving uphill).

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Now for the math The force on a charge is: F = E * q on Where q on
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