Which of the following statements is incorrect ?
E.F –> Elastic forces
1) E.F are strictly conservative when Hooke’s law is obeyed
2) Elastic hysterises signifies non – conservative forces
3) E.F are conservative as long as loading & unloading curves are identical even if they are not linear
4) Stretching of a coil is determined by its shear modulus
1) E.F are strictly conservative when Hooke’s law is obeyed