Mechanical Prop...

The adjacent graph shows the extension (l) of a wire of length 1 m suspended from the top of a roof at one end and with load 'W' connected to the other end. If the cross-sectional area of the wire is $$ 10^{-6}$$$$m^{-2}$$, calculate the Young modulus of the material of the wire:

A rod of length L and diameter D is subjected to a tensile load P. Which of the following is sufficient to calculate the resulting change in diameter?

A wire of initial length $$L$$ and radius $$r$$ is stretched by a length $$l$$. Another wire of same material but with initial length $$2L$$ and radius $$2r$$ is stretched by a length $$2l$$. The ratio of the stored elastic energy per unit volume in the first and second wire is,

The materials, which do not show a fixed trend of deformation vs. applied force, are called:

A metal rod is fixed rigidly at two ends . If $$L, \alpha$$ and $$Y$$ respectively denote the length of the rod, coefficient of linear thermal expansion and Young's modulus of its material, then for an increase in temperature of the rod by $$\triangle T$$, the longitudinal stress developed in the rod is

In the Searle's method to determine the Young's modulus of a wire, a steel wire of length $$156cm$$ and diameter $$0.054\ cm$$ is taken as experimental wire. the average increase in length for $$1.5\ kgwt$$ is found to be $$0.050cm$$. then the Ypung's modulus of the wire is 

When temperature of gas is $$20^{0}C$$ and pressure is changed from $$P_1$$=1.01$$\times 10^{5}$$Pa to $$P_2$$=1.165$$\times 10^{5}$$Pa then the volume changed by 10%. the bulk modulus is:

Stretching of a rubber band results in ___________.

An iron rod of length 2m and cross- sectional area of $$50mm^{2}$$ stretched by 0.5mm, when a mass of 250 kg is hung from its lower end. Young's modulus of iron rod is 

A copper wire of length 2.2 m and a steel wire of length 1.6 m, both of diameter 3.0 mm are connected end to end. When stretched by a force, the elonation in length 0.50 mm is produced in the copper wire. The stretching force is
$$(Y_{cu}=1.1\times 10^{11}N/m^2, Y_{steel}=2.0\times 10^{11}N/m^2)$$