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x welcome, omar. Blackbo X https://blackboard.learn.t x Hom lipitphysics.com/Course/ViewProblem unittemID-30941388enrollmentiID-259036 Saturday, October 7 1 4:02 PM FlipltPhysics macmillan learning Physics 4B: EM and Heat, F2017 Callfornia State Untversity, Fresno Unit 7: Prelecture Checkpoint Homework / Homework: HW7 of CH21 Deadline: 100% until Monday, October 9 at 11:59 PM Tipler6 21.P.030. Three charges, each of magnitude 1 nC, are at separate corners of a square of edge length 4 cm. The two ch at opposite corners are positive, and the other charge is negative. Find the force exerted by these charges on a fourth charge qu+3nCat the remaining (upper right) crner. (Assume the-x axts is directed y axis s directed upward.) 1) Ni Submit 1.37 10A-5 You currently have 1 submissions for this question. Only 10 submission are allowed. You can make 9 more submissions for this question. 2) N Submt You currently have O submissions for this question. Only 10 submission are allowed. You can make 10 more submissions for this question,

Explanation / Answer

Force due to both +1 nC on +3 nC

Fx i + Fy j.

Now due to -1 nC the force of attraction along the diagonal be Fd = Fisin60

Fd = -0.707 F i - 0.707 F j

Net Force = (Fx-0.707 F) i +(Fx- 0.707F) j

Now

Fx = 9 x109 * 1 x 10-9 * 3 x 10-9 / (0.042)N

Fx = 1.6875 x10-5 N

and

F = 9 x109 * 1 x 10-9 * 3 x 10-9 / 0.0032 N

F = 8.4375 x 10-6 N

0.707F = 5.96 x 10-6 N

Net Force = 1.091 x 10-5 i + 1.091 x 10-5 j

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