Elasticity
Physics ⇒ Mechanics
Elasticity starts at 11 and continues till grade 12.
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See sample questions for grade 11
A copper wire of length 3 m and cross-sectional area 2 mm² is stretched by a force of 300 N. If the extension is 1.5 mm, calculate the Young's modulus.
A cube of volume 1 m³ is subjected to a uniform pressure of 10⁶ Pa, resulting in a decrease in volume by 0.001 m³. Calculate the bulk modulus.
A material has a bulk modulus of 2×10⁹ Pa. If a pressure of 4×10⁶ Pa is applied, what is the fractional change in volume?
A rod is compressed by a force of 500 N, causing a decrease in length of 0.2 mm. If the original length is 1 m and area is 5 cm², calculate the stress and strain.
A rod of length 2 m is stretched by 1 mm under a force of 500 N. If its cross-sectional area is 1 cm², calculate the stress and strain.
A steel rod of length 1 m and area 2 cm² is subjected to a tensile force of 2000 N. If Young's modulus for steel is 2×10¹¹ Pa, calculate the extension produced.
A wire is loaded with a force of 100 N and its length increases from 1 m to 1.001 m. If its area is 1 mm², calculate the stress and strain.
A wire is stretched such that its length increases by 0.2%. If the original length is 2 m, what is the extension?
A wire of length 2 m and cross-sectional area 1 mm² is stretched by a force of 100 N. If the extension produced is 1 mm, calculate the Young's modulus of the material.
A wire of length 4 m and area 0.5 mm² is loaded with a force of 400 N. If the extension is 2 mm, find the Young's modulus.
Define plasticity.
Define stress and strain.
Explain the difference between elastic and plastic deformation with examples.
Explain why glass is considered brittle.
Explain why steel is preferred over rubber for making springs.
If the Poisson's ratio of a material is 0.3, and the longitudinal strain is 0.01, what is the lateral strain?
State Hooke's Law.
Which modulus of elasticity is relevant when a body is subjected to a change in shape without a change in volume?
