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GE Mon 5:15 AM Q E Firefox Ed View History Bookmarks Tools Window Help File O O O MasteringPhysics: Hwa3 x DM Mathway l Math Problem s... x c Two Point Charges Q And x C A 8.75-?C Point Charge ls... x e a 5 shown in the figure Figure 1). V E https://session. masteringphysics.com 6051 4964 /myct 1750 SP16 PHY Signed in as wejdan abu khamees Help Close HW#3 xercise 21 Resources previous l 6 of 10 l next v You completed this assignment. Exercise 21.34 Part A A 8.75-Au C point charge is glued down on a horizontal Find the tension in the wire frictionless table It is tied to a -6.50-AuC point charge by a light, nonconducting wire. A uniform electric field of T 382 N magnitude 1.85 x 108 N/C is directed parallel to the wire, as shown in the figure (Figure 1) Subm My Answers Give Up Correct 1 of 1 gure Part B What would the tension be if both charges were negative? T 2020 N Subm My Answers Give Up 2.50 cm Correct 8.75 MC 6.50 AC Continue Provide FeedbackExplanation / Answer
force acting on the charge is
F = qE = 6.5 * 10^-6 C(1.85 * 10^8 N/C = 1.20 *10^3N
Columb force between charges is
Fq = kq1 q2/ r^2 = 9 * 10^9 ( 6.5 * 10^-6 )( 8.75 * 10^-6 )/0.0250 m)^2 = 8.18 *10^2 N
net force along x axis zero
Fx = 0
T + Fq - F= 0
T = F-Fq = 1.20 *10^3N- 8.18 *10^2 N=382 N
Now Fq is to the left , since like charges repel
Fx = 0
T- Fq - F = 0
T = F+Fq = 1.20 *10^3N+ 8.18 *10^2 N=2020 N
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