A positively charged ball with charge q and mass m is attached to a horizontal spring. In the presence of a uniform electric field E = 10 000 N/C, the ball is in equilibrium when the string makes an angle 0 above the horizontal. All the forces acting on the ball are shown in the figure. The tension in the string is T = 0.1 N. What is the magnitude of the charge q (in µC)? 20° y, a = 45° 0 = 20 O 13.3 O5.7 10.8 20.0 20.8

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Chapter1: Units, Trigonometry. And Vectors
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A positively charged ball with charge q and mass m is
attached to a horizontal spring. In the presence of a
uniform electric field E
= 10 000 N/C, the ball is in
equilibrium when the string makes an angle 0 = 20°
above the horizontal. All the forces acting on the ball
are shown in the figure. The tension in the string is
T = 0.1 N. What is the magnitude of the charge q
( in μC)?
a = 45°
0 = 20
13.3
5.7
10.8
20.0
20.8
Transcribed Image Text:A positively charged ball with charge q and mass m is attached to a horizontal spring. In the presence of a uniform electric field E = 10 000 N/C, the ball is in equilibrium when the string makes an angle 0 = 20° above the horizontal. All the forces acting on the ball are shown in the figure. The tension in the string is T = 0.1 N. What is the magnitude of the charge q ( in μC)? a = 45° 0 = 20 13.3 5.7 10.8 20.0 20.8
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