NEET · Physics · Mechanical Properties of Solids doubts

6 doubts found

Two wires of the same material carry the same load. How can I tell which stretches more?

Start from Delta L = FL/(AY).

What does “Stress and strain” actually mean in Mechanical Properties of Solids, and why does it matter for NEET?

Stress measures internal restoring force per area; strain measures fractional deformation. Stress has pressure units, while strain is dimensionless.

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NEETPhysicsmedium

I keep getting “Stress and strain” questions wrong in Mechanical Properties of Solids. What's the trap?

giving strain the unit metre.

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NEETPhysicseasy

What does “Hooke's law and elastic limit” actually mean in Mechanical Properties of Solids, and why does it matter for NEET?

For small deformation within the proportional limit, stress is proportional to strain. Beyond that range the graph need not remain linear, and beyond the elastic limit the body may not recover fully.

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NEETPhysicsmedium

I keep getting “Hooke's law and elastic limit” questions wrong in Mechanical Properties of Solids. What's the trap?

using Hooke's law up to fracture.

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NEETPhysicseasy

What does “Young, bulk and shear moduli” actually mean in Mechanical Properties of Solids, and why does it matter for NEET?

Young's modulus resists length change, bulk modulus resists volume change, and shear modulus resists shape change. A larger modulus means less strain for the same corresponding stress.

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