Mastering Physics: Homework #1 Ch 25 Google Chrome https:// session.masteringphy

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Mastering Physics: Homework #1 Ch 25 Google Chrome https:// session.masteringphysics.com 44115440 PHY131, SPRING C 2015, iCOURSE Homework Ch 25 Problem 25.17 #1 Problem 25.17 Part A hat is the magnitude of the net electric force on charge Bin the figure? (Figure 1)Assume a 1.9cmand b 1.1cm. Express your answer to two significant figures and include the appropriate units. F 3.473 10 N Submit My Answers Give Up incorrect; Try Again; 3 attempts remaining Figure 1 Part B .0 nC What is the direction of the net electric force on charge Bin the figure? The force is directed up. The force is directed down. My Answers Give Up BI 2.0 nC Correct C. 2.0 nC Match The Graph Chegg Study Gui Mastering phy Sticky Notes Help I Close previous l 7 of 14 l next Provide Feedback Continue

Explanation / Answer

so C will pull B down and A will push B down so the force will add

F = FA + FC = k A B/r^2 + k B C/r^2 = 9.0E9*1.0E-9*2.0E-9/0.019^2 + 9.0E9*2.0E-9*2.0E-9/0.011^2= 3.47E-4 N

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