College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Textbook Question
Chapter 18, Problem 63PE
Integrated Concepts
(a) In Figure 18.59, four equal charges q lie on the corners of a square. A fifth charge Q is on a mass m directly above the center of the square, at a height equal to the length d of one side of the square. Determine the magnitude of q in terms of Q. m, and d, if the Coulomb force is to equal the weight of m. (b) Is this equilibrium stable or unstable? Discuss.
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Consider the figure below.
(b) o
0.
-20
-20
+10+
+34
10
10
cm
2+1
+9
x (cm)
x (cm)
a. Find the total Coulomb force on a charge of 4.9 C located at x3,7 cm in part (b) of the figure,
given that q-1.9 µC (indicate the direction with the sign of your answer.)
0.904
b. Find the x-position (between x-0 cm and x 14 cm) at which the electric field is zero in part (b) of
the figure.
Consider the point charges arranged at the corners and at the center of a square, as depicted in the figure.
a)Find the magnitude of the net Coulomb force, in newtons, on the charge q in the figure, given that q = 1.2 μC, qa = 2.8 μC, qb = -4.4 μC, qc = -5.9 μC, and qd = 1.7 μC. The square is 34 cm on a side.
A point charge +2Q is at the origin and a point charge −Q is located along the x axis at x = d as in the figure below. Find a symbolic expression for the net force on a third point charge +Q located along the y axis at y = d. (Use the following as necessary: ke, the Coulomb constant, Q, and d.)
Chapter 18 Solutions
College Physics
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