why is the external load not shown in the free body diagram of limk 2 and 4? 3-4Sketch a free-body diagram of each element in the figure. Compute the magnitude and direction of each forceusing an algebraic or vector method, as specified.F=400 N.30°60⁰A1.9 m09 m-60° E5

To find:The forces in each element.FBD:The free-body diagram is shown below.

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hy is the external load not shown in the free body diagram of limk 2 and 4?

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter1: Tension, Compression, And Shear

Section: Chapter Questions

Problem 1.8.22P: A cargo ship is tied down to marine boll arts at a number of points along its length while its cargo...

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Concept explainers

Types of loading

In mechanical terminology, the term load indicates that external force/weight, either constant or variable, acts on a mechanical member/structure. The weight of an object of a specific material is also an external load, and the external force that works on a structure comes under the categories of loading. The external load generates its effects as stress and strain in the structure.

Question

why is the external load not shown in the free body diagram of limk 2 and 4?

3-4
Sketch a free-body diagram of each element in the figure. Compute the magnitude and direction of each force
using an algebraic or vector method, as specified.
F=400 N.
30°
60⁰
A
1.9 m
0
9 m-
60° E
5

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What I am struggling to understand from this problem. (1) Why does the external load not show up in the FBD of links 4 and 2? (2) why do points B and D not have a force in y-direction?

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