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Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Find the force P that must be applied in order for the

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Expert Solution

Step 1
Principle of Virtual Work:
When a particle is acted upon by a set of forces in static equilibrium, we may impart to the particle a virtual displacement consisting of a translation of the particle in any direction. During this virtual displacement, the virtual work done by the forces must be zero because the forces are in equilibrium.
Consider the figure shown below:
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