Physics · Elastic behaviour, stress-strain relationship, Hooke's Law
Which of the following statements is incorrect?
Which of the following statements is incorrect?
- A. When a material is under tensile stress, the restoring forces are caused by interatomic attraction while under compressional stress, the restoring force is due to interatomic repulsion
- B. The stretching of a coil is determined by its shear modulus
- C. Rubber is more elastic than steel
- D. Shearing stress plays an important role in the buckling of shafts
Step-by-step solution
Elasticity, in physics, refers to a material's ability to return to its original shape after deformation. Steel has a much higher Young's modulus and a greater elastic limit than rubber, meaning it requires more stress to deform and returns more precisely to its original shape. Rubber, while capable of large deformations, is less elastic because it exhibits more inelastic behavior and has a lower modulus. Thus, steel is actually more elastic than rubber, making statement C incorrect.
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