Answered: Z P UST CE T FBA Б C TO D E

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter8: Computer Numerical Control

Section8.1: Cnc Basics

Problem 2RQ: What is an MCU and what is its function?

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Question

The tripod shown supports a 5-m by 2-m rectangular panel through member AB, which is parallel to z-axis. The tripod is designed so that the resultant of the force in members BC, BD and BE is equivalent to the compressive force in member BA. Note that point A is at the centroid of the rectangular panel. Given the coordinates:
A(0, 6.5, 1.5) m
B(0, 6.5, 0) m
C(-1.2, 0, 3.4) m
D(4.3, 0, 3) m
E(1.4, 0, -5.4) m

If the rectangular panel carries a wind pressure equivalent to P = 14.6 kPa (kN/m2), calculate the magnitude of the following with complete fbd.
1. Force in member BC, in kN.
2. Force in member BD, in kN.
3. Force in member BE, in kN.