Elasticity
Physics ⇒ Mechanics
Elasticity starts at 11 and continues till grade 12.
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See sample questions for grade 12
A metal wire is loaded with a weight and its extension is measured. If the temperature increases, what happens to the extension, assuming the load remains constant?
A wire is stretched by a force F, producing an extension x. If the force is doubled, what happens to the extension, assuming the elastic limit is not exceeded?
Define Poisson's ratio.
Describe the effect of increasing the cross-sectional area of a wire on its extension under a given load.
A copper wire of length 1.5 m and area 2 mm2 is subjected to a tensile force of 300 N. If Young's modulus for copper is 1.2 × 1011 N/m2, find the increase in length.
A cube of volume 0.01 m3 is subjected to a uniform pressure of 2 × 105 Pa. If the bulk modulus of the material is 1 × 109 Pa, calculate the decrease in volume.
A cylindrical rod of length 2 m and radius 0.5 cm is subjected to a tensile force of 500 N. If the extension produced is 1 mm, calculate the stress in the rod.
A metal wire is loaded with a weight and its extension is measured. If the temperature increases, what happens to the extension, assuming the load remains constant?
Which of the following best describes an elastic body? (1) A body that regains its original shape after the removal of deforming force (2) A body that cannot be deformed (3) A body that breaks easily (4) A body that does not regain its shape after deformation
Which of the following is not a type of modulus of elasticity? (1) Young's modulus (2) Bulk modulus (3) Modulus of rigidity (4) Modulus of inertia
Which of the following is the correct definition of Young's modulus? (1) The ratio of stress to strain in a material under tensile stress (2) The ratio of strain to stress in a material under compressive stress (3) The product of stress and strain in a material (4) The ratio of force to area in a material under shear stress
Which of the following is the correct relationship between Young's modulus (Y), bulk modulus (K), and Poisson's ratio (σ) for an isotropic material? (1) Y = 3K(1 - 2σ) (2) Y = 2K(1 + σ) (3) Y = K(1 + 2σ) (4) Y = 3K(1 + 2σ)
The ability of a material to absorb energy and deform plastically before fracturing is called ________.
The breaking stress of a material is also known as its ________ strength.
The maximum value of stress that a material can withstand without permanent deformation is called the ________ limit.
The modulus of rigidity is also known as ________ modulus.
True or False: For most metals, the value of Poisson's ratio lies between 0 and 0.5.
True or False: The area under the stress-strain curve up to the elastic limit represents the elastic potential energy stored in the material.
True or False: The elastic limit is the maximum stress that a material can withstand and still return to its original shape after the stress is removed.
Yes or No: Is bulk modulus a measure of a material's resistance to uniform compression?
