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Comparing bone with most other structural materials, what unusual relationship does the source describe between bone's shear modulus and its Young's modulus?
ABone has no measurable Young's modulus of its own
BBone's shear modulus is always exactly equal to zero
CBone's shear modulus is much smaller than its Young's modulus
DBone's shear modulus exceeds its Young's modulus, rivaling steel
Answer & Solution
Correct answer: D. Bone's shear modulus exceeds its Young's modulus, rivaling steel
1. For most materials, shear moduli are smaller than Young's moduli.
2. Bone is called out as a remarkable exception to that general pattern.
3. For bone, the shear modulus is not only greater than its Young's modulus, but is as large as that of steel.
4. The source ties this directly to why bones feel so rigid under sideways loading, so a shear modulus of zero would contradict that stated rigidity.
_Source: OpenStax College Physics (CC BY 4.0), Ch 5 "Further Applications of Newton's Laws: Friction, Drag, and Elasticity", section 5.3 Elasticity: Stress and Strain_
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