question_answer

A rod of length 3 m and uniform cross-section area \[1\text{ }m{{m}^{2}}\]is subjected by four forces at different cross-section as shown in the figure. Young's modulus of the rod is \[2\times {{10}^{11}}\text{ }N/{{m}^{2}}\]. What is the total potential energy (in mJ) stored in the rod?         

Answer:

1.181