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A rigid L-shaped lever arm is pivoted at point P.

Three forces act on the lever arm, as shown in the diagram.
What is the magnitude of the resultant moment of these forces about point P?

A rigid L-shaped lever arm is pivoted at point P. Three forces act on the lever arm, as shown in the diagram. What is the magnitude of the resultant moment of t class=

Answer :

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Below are the choices that can be found from other source:

A. 15 Nm
B. 20 Nm
C. 35 Nm
D. 75 Nm

The answer is A. 15 Nm. Below is the solution:

-5 (2) - 10 (2) + 15 (3) = 15

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