Question 4.13: Distance Between the Lines of Action The force F in Fig.4.33...

Engineering Mechanics: Statics

Distance Between the Lines of Action

The force F in Fig. 4.33 is -20i + 20j + 10k (lb).

(a) What moment does the couple exert on the bracket?

(b) What is the perpendicular distance D between the lines of action of the two forces?

strategy
(a) We can choose a point and determine the sum of the moments of the forces about that point.

(b) The magnitude of the moment of the couple equals D |F|, so we can use the result of (a) to determine D.

4.33

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