A Matlab x M Yuan Xuan at Penns X M Mastering Physics: C X Me Mastering Physics:

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A Matlab x M Yuan Xuan at Penns X M Mastering Physics: C X Me Mastering Physics: C X MasteringPhysics: C X MPHYSIOS 211 awas x MCA sailboat Is Travelinx MCA sailboat ls Travelin x https:// session.masteringphysics.com/ myct/itemView? assignmentProblemID 62822382 Physics 211 SUMMER 2016 Mechanics Signed in as Eisa Al-Ali Help Close Chap 3-Vectors (Mandato Knigh Problem 3.44. Resources previous l 9 of 13 l next Problem 3.44 Part A The figure (Figure 1) shows four electrical charges located at the Assuming that forces are vectors, what is the magnitude of the net force F exerted on charge A? corners of a rectangle. Like charges, you will recall, repel each other while opposite charges attract. Charge Bexerts a repulsive force (directly away from B) on charge A of 4.2 N. Charge C exerts an attractive force (directly toward C) on charge A of 8.4 N Finally, charge D exerts an attractive force of 2.8 N on charge A. Subm My Answers Give Up incorrect; Try Again; 17 attempts remaining Part B What is the direction of the net force net exerted on charge A? F Figure 1 o counterclockwise from the left 141 cm Submit My Answers Give Up Continue Provide Feedback 100 cm

Explanation / Answer

angle made by

F(DA) with horizontal is

alpha = arctan 100/141 = 35.3 degree

Fx = 4.2-2.8 cos 35.3 = 1.916 N

Fy = 8.4 + 2.8sin35.3 = 10.018 N

Fnet = 10.199 N ( answer)

b)

theta = arc tan (Fy/Fx)

theta = 79.17 degree

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