The truss ABC is constructed of three titanium (E Ti ​ =17.4×10 3 ksi) members. A horizontal force of 1.8 kip and an unknown force P are applied to the truss at point B as shown. Member AB has a cross-sectional area of 0.1in 2 , member BC has a cross-sectional area of 0.0025ft 2 , and member AC has a cross-sectional area of 0.2 in2.   b) Determine the magnitude of the force P that is required to displace the roller at point C to the right by .03 inches.

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