(a) The force of gravity, F, between two masses, m and M, separated by a distance r, is given by where G is a constant. Write an equation of r in terms of other variables in the equation GmM F= 2 for F: r= (b) The electric force between two charges q=3.10-6 units and Q=-4-10-6 units separated by a distance, d=310-4 units, is given by F= where k=9. 10⁹ units. Without using a calculator, calculate the F. F= (c) Two positive electric charges, q and Q are separated by a distance d. Assume that q> Q>0. The position x from charge q where the electric field zero is given by: kq x² kQ (d-x)² kqQ d²' Solve for x in terms of the other variables. The quantity k is a constant. Solution 1 represents the largest value of x. Hint: The solution can be simplified in many ways. The solutions accepted below have a form d -b√ 2 1 d a+b√ You need to figure out the constants a and b in each case. Solution 1: x= Solution 2: x= Solution 1 = Solution 2 = a-

University Physics Volume 2
18th Edition
ISBN:9781938168161
Author:OpenStax
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Chapter5: Electric Charges And Fields
Section: Chapter Questions
Problem 101P: In this exercise, you practice electric field lines. Make sure you represent both the magnitude and...
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In the following problems, you don't need to understand the physics to complete the questions.
Focus on the equations.
(a) The force of gravity, F, between two masses, m and M, separated by a distance r, is given by
where G is a constant. Write an equation of r in terms of other variables in the equation
GmM
F=
2
for F:
r=
(b) The electric force between two charges q=3·10¯6 units and Q=-4·10¯6 units separated by a
distance,
1
d = 3-10-4 units, is given by F=
where k=9. 10⁹ units.
Without using a calculator, calculate the F.
F=
kq
x²
(c) Two positive electric charges, q and Q are separated by a distance d. Assume that q> Q> 0. The
position x from charge q where the electric field zero is given by:
=
kQ
(d-x)²
kqQ
d²
Solve for x in terms of the other variables. The quantity k is a constant. Solution 1 represents the
largest value of x.
Hint: The solution can be simplified in many ways. The solutions accepted below have a form
d
Solution 1 =
a-b
Solution 2 =
d
a+b√√
You need to figure out the constants a and b in each case.
Solution 1: x=
Solution 2: x=
Transcribed Image Text:In the following problems, you don't need to understand the physics to complete the questions. Focus on the equations. (a) The force of gravity, F, between two masses, m and M, separated by a distance r, is given by where G is a constant. Write an equation of r in terms of other variables in the equation GmM F= 2 for F: r= (b) The electric force between two charges q=3·10¯6 units and Q=-4·10¯6 units separated by a distance, 1 d = 3-10-4 units, is given by F= where k=9. 10⁹ units. Without using a calculator, calculate the F. F= kq x² (c) Two positive electric charges, q and Q are separated by a distance d. Assume that q> Q> 0. The position x from charge q where the electric field zero is given by: = kQ (d-x)² kqQ d² Solve for x in terms of the other variables. The quantity k is a constant. Solution 1 represents the largest value of x. Hint: The solution can be simplified in many ways. The solutions accepted below have a form d Solution 1 = a-b Solution 2 = d a+b√√ You need to figure out the constants a and b in each case. Solution 1: x= Solution 2: x=
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