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#deformation

2 public questions tagged with this topic.

Young's Modulus and Elasticity

Why do materials like steel require a significantly larger force to produce small deformations compared to materials lik

Steel has a much larger Young’s modulus compared to rubber, meaning it has greater stiffness and requires more force to produce the same strain. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Due to larger Young’s modulus. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.

Ref: University Physics, Chapter 17: Thermal Expansion.

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Rotational Motion Applications

Why can a rigid body not deform under the influence of forces in theoretical mechanics?

In theoretical mechanics, a rigid body is an idealization where inter-particle distances are fixed, preventing deformation and allowing focus on rotational and translational motion only. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Because it is an idealization with fixed distances. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.

Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.

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