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EE204B_Lesson_06_ELectrostatic_Fields-1_

# If we do our vector addition using components we must

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Unformatted text preview: the two. If we do our vector addition using components, we must resolve our forces we do our vector addition using components we must resolve our forces into their x- and y-components. EE204B Electromagnetics Prof. Yong H. Won Spring 2010 10 Lesson 06 Step 1: Diagram y Draw a representative sketch. Draw and label relevant quantities. Draw axes, showing origin and directions. F23 Q3=+65μC 30 cm F13 θ=30º Q2=+50μC 52 cm Q1=-86μC x Draw and label forces (only those on Q3). Draw components of forces which are not along axes. EE204B Electromagnetics Prof. Yong H. Won Spring 2010 11 Lesson 06 Step 2: Starting Equation y F23 Q3=+65μC 30 cm F13 θ=30º Q2=+50μC 52 cm Q1=-86μC x q1q2 F12 = k 2 r12 “Do I have to put in the absolute value signs?” EE204B Electromagnetics Prof. Yong H. Won Spring 2010 12 Lesson 06 Step 3: Replace Generic Quantities by Specifics y r Q2Q3 F23 = k 2 , r23 repulsive Q2Q3 =k 2 r23 F23 Q3=+65μC r23=30 cm F13 F23, y θ=30º Q1=-86μC 52 cm x Q2=+50μC F23, x = 0 (from diagram) F23,y = 330 N and F23...
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