iPad 4:39 PM D.Gray-Man 40 Read D.Gr X E https://session.masteringp x Mastering
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iPad 4:39 PM D.Gray-Man 40 Read D.Gr X E https://session.masteringp x Mastering Physics: HW2 x C G https://session.masteringphysics.com/myct/itemview?as b Physics for Sciences 2 in as charley correa 15.12 4 of 7 A32g aluminum foil ball with a charge of +49x10 C is suspended on a string in a uniform horizontal field. The string deviates to the right and makes an angle of 30 withthe vertical Part A What information about the field can you determine for this situation? only the magnitude O only the direction of E o both the magnitude and the direction of E O none of the above Correct Part B Determine the magnitude of the electric field Express your answer to two significant figures and include the appropriate units. Value Units Submit My Answers Give Up A S D F G H J K L return 123Explanation / Answer
I see you have part A correct, so here is how to do part B...
The forces acting in the vertical direction are the weight and the vertcial component of the tension in the string.
mg = Tcos(30)
(.0032)(9.8) = Tcos(30)
T = .03621 N
In the horizontal direction, the horizontal component of the tension must balance the electrical force
Tsin(30) = qE
(.03621)(sin 30) = (4.9 X 10-9)(E)
E = 3.70 X 106 N/C
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