Conditions of symmetry in torsional problem ensures that:
(i) Plane sections originally normal to the plane of twist remain plane after twist.
(ii) There is no lengthening or shortening of the shaft.
(iii) Straight diameters are carried into straight diameters by the twisting deformation
Which of the above statements are correct?
1
(i) and (ii)
2
All (i), (ii) and (iii)
3
(i) and (iii)
4
(ii) and (iii)