Mechanical Properties of Solids

What is the SI unit of stress?

Young's modulus is defined as the ratio of:

A wire of length L and area of cross-section A is stretched by a force F. Which of the following expressions gives the elongation \( \Delta L \)?

Which of the following is NOT a mechanical property of solids?

If the bulk modulus of a material is very high, it means the material is:

Poisson's ratio \( \sigma \) is defined as the ratio of:

A steel wire of length 2 m and diameter 1 mm is stretched by a force of 100 N. Given Young's modulus for steel is \( 2 \times 10^{11} \) Pa, what is the approximate elongation?

Which graph correctly represents the elastic behavior of a material under tensile stress?

If the shear modulus of a material is \( 4 \times 10^{10} \) Pa and its Poisson's ratio is 0.3, what is the Young's modulus? (Use \( Y = 2G(1 + \sigma) \))

During plastic deformation, the stress-strain curve shows: