*2.5-11 A rigid triangular frame is pivoted at C and held by two identical horizontal wires at points A and B (see figure). Each wire has axial rigidity EA 120 k and coefficient of thermal expansion a 12.5 x 10 F. (a) If a vertical load P= 500 lb acts at point D, what are the tensile forcgn T, and T, in the wires at A and B, respec- tively? (b) If, while the load P is acting, both wires have their temperatures raised by 180°F, what are the forces T, and T? (c) What further increase in temperature will cause the wire at B to become slack?
*2.5-11 A rigid triangular frame is pivoted at C and held by two identical horizontal wires at points A and B (see figure). Each wire has axial rigidity EA 120 k and coefficient of thermal expansion a 12.5 x 10 F. (a) If a vertical load P= 500 lb acts at point D, what are the tensile forcgn T, and T, in the wires at A and B, respec- tively? (b) If, while the load P is acting, both wires have their temperatures raised by 180°F, what are the forces T, and T? (c) What further increase in temperature will cause the wire at B to become slack?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:*2.5-11 A rigid triangular frame is pivoted at Cand held by
two identical horizontal wires at points A and B (see figure).
Each wire has axial rigidity EA = 120 k and coefficient of
thermal expansion a = 12.5 x 10"E.
(a) If a vertical load P = 500 lb acts at point D, what are
the tensile forcey TA and T, in the wires at A and B, respec-
tively?
(b) If, while the load P is acting, both wires have their
temperatures raised by 180°F, what are the forces T, and T?
(c) What further increase in temperature will cause the
wire at B to become slack?
%3D
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