The trap door OA is raised by the cable AB, which passes over the small fric- tionless guide pulleys at B. The tension everywhere in the cable is T, and this ten- sion applied at A causes a moment Mo about the hinge at O. Plot the quantity Mo/T as a function of the door elevation angle 0 over the range 0 s 0 90° and note min- imum and maximum values. What is the physical significance of this ratio?

The trap door OA is raised by the cable AB, which passes over the small fric- tionless guide pulleys at B. The tension everywhere in the cable is T, and this ten- sion applied at A causes a moment Mo about the hinge at O. Plot the quantity Mo/T as a function of the door elevation angle 0 over the range 0 s 0 90° and note min- imum and maximum values. What is the physical significance of this ratio?

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter5: Three-dimensional Equilibrium

Section: Chapter Questions

Problem 5.39P: The bent rod of negligible weight is supported by the ball-and-socket joint at B and the cables...

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Concept explainers

Buckling of columns

The column is described as a vertical member of the structure that carries an axial compressive load, and buckling is a lateral deformation of the column under the application of load.

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42 Chapter 2 Force Systems
SAMPLE PROBLEM 2/6
B
The trap door OA is raised by the cable AB, which passes over the small fric-
tionless guide pulleys at B. The tension everywhere in the cable is T, and this ten-
sion applied at A causes a moment Mo about the hinge at O. Plot the quantity Mo/T
as a function of the door elevation angle 0 over the range 0 < 0 < 90° and note min-
imum and maximum values. What is the physical significance of this ratio?
0.3 m
0.4 m
0.5 m

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