(Solved): A rigid bar \( A B C D \) is supported by wires \( A E \) and \( B F \) and a pin at C When alura \ ...

A rigid bar \( A B C D \) is supported by wires \( A E \) and \( B F \) and a pin at C When alura \( p \) \( =25 \mathrm{kN} \) is applied, point \( A \) displaces vertically downwards by \( 1.9 \mathrm{~mm} \) Determine the normal strain in wire BF, answer to include 3 sigififont tigits