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 44115445&offset; next PHY131, SPRING C 2015, iCOURSE Homework Ch 25 Problem 25.59 #1 Problem 25.59 Part A Two 3.60g point charges on 1.00-m-long threads repel each What is the charge q? other after being equally charged, as shown in the figure.(Figure Express your answer to three significant figures and include the appropriate units. 1) ssume that 0 4.0 Value nits Submit My Answers Give Up Figure 1 1.00 m/ 0 0 00 m MasteringPhysics: Sticky Notes Help I Close previous l 3 of 14 next Provide Feedback Continue 10 26 PM

Explanation / Answer

let T be the tension in the thread

then T cos 14 = mg

T = 3.6*10^-3 *9.81/cos14

   = 0.036397 N

force on the bead = Tsin14

9*10^9 * q^2/(1*2*sin 14)^2 = 8.8053*10^-3 N

q = 4.78*10^-7 C

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