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How can we use what we already know about forces to understand Coulomb’s Law?

posted Feb 23, 2018, 11:37 AM by Barbara Fortunato   [ updated Feb 26, 2018, 9:38 AM by Barbara Fortunato ]
5: M 2/26, 7: M 2/26

Forensic Physics Lab handwritten write-up due at the beginning of class today.

Today, we'll start class by looking over the Electroscope Lab Answers together.

Then, we will learn how to use Coulomb’s Law. We will draw similarities and differences to Newton’s law of universal gravitation (inverse square law). In addition, we will learn to solve problems with multiple point charges using the Principle of Superposition.  With any time remaining, you can start your homework in class.

This information can be reviewed by watching the beginning of this video until 13:27. (This video was created for my AT Physics classes, so you can ignore the parts about r-hat and 1/4πεo and just use the formula to find the magnitude of the force.) 

Electric Force and Fields


Presentation:  Coulomb's Law Problems
Answer KeyElectroscope Lab Answers
Homework: Forensic Physics Lab due tonight.  Electroscope Quiz Wednesday, February 28th.  Forensic Physics Lab Quiz also Wednesday, February 28th.  Pd 5 only: Do FYP: Coulomb's Law #1-8  (SOLUTIONS).  For extra practice (optional), try pp. 1-4 in the Electrostatics Hewitt Packet.
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