A nylon thread is subjected to a 2-lb tension force. Knowing that E = 0.5 x 10^6 psi and that the maximum allowable normal stress is 6 ksi, determine (a) the required diameter of the thread, (b) the corresponding percent increase in the length of the thread.

Please show intermediate steps including free body diagrams, equations used, and problem
setup so that your approach can be followed.

A nylon thread is subjected to a 2-lb tension force. Knowing that E = 0.5 x 10^6
psi and that the maximum allowable normal stress is 6 ksi,
determine (a) the required diameter of the thread, (b) the corresponding percent increase in
the length of the thread.