Equilibrium of Forces The forces F1, F2, …, Fn acting at the same point P are said to be in equilibrium if the resultant force is zero, that is, if
70. F1 = i − j, F2 = i + j, F3 = −2i + j
(a)
To find: The resultant force of force
Answer to Problem 70E
Resultant force acting at point P is
Explanation of Solution
Given:
Force
Formula used:
If
Calculation:
Force
If
Combine terms with i, and and terms with j,
Therefore resultant force acting at point P is
(b)
To find: The additional force required for the forces to be in equilibrium.
Answer to Problem 70E
Additional force required is
Explanation of Solution
Given:
Force
Formula used:
If
Calculation:
If
From section (1) value of
Thus, additional force required is
Chapter 9 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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