Charges 
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TopicsElectrostatics, interactions of charged objects, Coulomb's law, charge distribution on conductors, vector superposition Points of EmphasisElectrostatic interactions of point charges and charge distributions, vector superposition PrerequisitesFacility with freebody diagrams and a strong understanding of Newton's 2nd and 3rd laws. Lab ActivitiesThis lab provides an introduction to electrostatic and is divided into four sections. Section I  Electrical Interactions. Students charge pieces of scotch tape in different ways and compare the interactions of the tapes with each other and with other objects at hand. Students are asked if their observations are consistent with idea that there are two types of charge. Section II  Superposition. Students use Coulomb's law and Newton's 3rd law to compare forces exerted on various charges configurations involving two, three and four point charges. These are thought exercises. No experimental work is done in this section. Section III  Distributed Charge. Students use a pith ball and acrylic rod to analyze the force on the pith ball by extended charge distributions. Section IV  A Model for Electric Charge. Students look at the interaction between a charged and uncharged object Course LevelIntroductory level courses: Physics 4, Physics 14 and Physics 16. Student HandoutsFaculty may see either David Abbott or Jan Largent for a copy of the writeup and the lab homework. Equipment
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