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09_26_Newton - 9/26 More Newtons Laws Text Chapter 4...

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9/26 More Newton’s Laws / Text: Chapter 4 sections 3-5 / Exam I…Still grading…and grading…and… / Presentation Plan / HW 9/26 “Forces and Acceleration” due Friday 9/28 / Lab Review / “Peer Guides” in Witmer Hall soon!!! / “Study Buddy” list with Val also 777-4 4 06 oops
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Presentation Plan / Earn up to 60% of lost points Example: 50 to 50 + 0.6(50) = 80 p Must decide to do this before the next exam (3 weeks) p Only for points lost on first exam p Present a problem and solution 10 minutes p Answer questions
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Tool Box and Language Free Body Diagrams: A picture of all the forces acting “on” a single object, none on other objects. A Free Body Diagram also identifies the object the force is caused “by.” (All forces have a real object as the cause) Example: This is the “Weight force” caused “by” the earth “on” Larry. This dot is Larry 1st subscript = “by” object 2nd subscript = “on” object W E,L
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Types of Forces Noncontact Forces Contact Forces Gravitational Nuclear Electromagnetic Pushes (touch)
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