Concept explainers
(a)
The total force on the
(a)
Answer to Problem 117P
The total force on the
Explanation of Solution
The following figure gives the diagram of the total force acting on the body.
Write the expression for the
Here,
Write the expression for the
Here,
Rewrite equation (I) using Coulomb’s force between two charges.
Here,
Rewrite equation (II) using Coulomb’s force between two charges.
Write the expression to find the total magnitude of the force.
Write the expression to find the direction of the force.
Conclusion:
Substitute equation (III) and (IV) in equation (V) to find the magnitude of total force.
Substitute
Substitute equation (III) and (IV) in equation (VI) to find the direction of total force.
Substitute
Therefore, the total force on the
(b)
The electric potential energy of the three charges.
(b)
Answer to Problem 117P
The electric potential energy of the three charges is
Explanation of Solution
Write the expression for the total potential energy of the charges.
Conclusion:
Substitute
Therefore, the electric potential energy of the three charges is
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