Q7. A 1.85 m long solid bar (Lo) with a 22 mm diameter is placed under tension by a load (F) of 125 kN. This solid bar is made of a homogeneous material with a Young's Modulus E = 150 GPa. Calculate the extension of the bar (AL). Give your answer in millimetres (mm) to two decimal places. Answer: Lo L AL

Q1: 30-mm-diameter steel bar is to be used as a torsion spring. If the torsional stress in the bar is not to exceed 110 MPa when one end is twisted through an angle of 30°, what must be the length of the bar in m? modulus of rigidity=80 GPa . (close to two decimal)

E. Rigid bar AD is horizontal before the weight of 112 lb is applied to the end of wire BC at C. The wires have a radius of 0.025" and are made of A913 steel. Determine the rotation of AD and how far C will move down due to application of the weight See Appendix of text for any material properties needed. Ans: 0.00071 radians 3 ft - 2 ft -3 ft- D B 4 ft W