Short / Long Question's Answer | Elasticity in Physics

Short Questions:

1. Explain which one is more elastic - rubber or steel.

2. Why are bridges declared after long use?

3. Why are rubbers used as vibration absorbers?

4. Two wires A and B have equal lengths and are made of the same material. If the diameter of wire A is twice that of wire B, which wire has the greater extension for a given load?

5. Explain in terms of breaking stress, why the elephant has thicker legs as compared to human begins?

6. What happens in Young's modulus of elasticity of a material when the load hanging on it is doubled?



Long Questions:

1. Define Young's modulus of elasticity. Derive an expression for energy stored in a stretched wire.

2. Define Young's modulus, bulk modulus, modulus of rigidity, and Poisson's ratio.

3. What are the proportional limit and elastic limit? Derive an expression for energy stored in a stretched wire.

4. State Hooke's Law and describe different types of modulus of elasticity.

5. State Hooke's Law  How would you verify it experimentally.

6. What does the term strain refer to? Write the different types of strain. Prove that the elastic energy stored per unit volume of a stretched wire is equal to $\frac{1}{2}*stress * strain$.

7. What is Poisson's ratio? Derive an expression for the energy stored in a stretched wire.


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