Mechanical Prop...

A metal rod of Young's modulus $$Y$$ and coefficient of thermal expansion $$\alpha$$ is held at its two ends such that its length remains invariant. If its temperature is raised by $${t}^{o}C$$, the linear stress developed in it is:

For which material the poisson's ratio is greater than 1

The maximum strain energy that can be stored in a body is known as:

The proportional limit of steel is $$8\times { 10 }^{ 8 }N/{ m }^{ 2 }$$ and its Young's modulus is $$2\times { 10 }^{ 11 }N/{ m }^{ 2 }$$. The maximum elongation, a one metre long steel wire can be given without exceeding the proportional limit is 

A rubber ball is taken to depth $$1$$ km inside water so that its volume reduces by $$0.05\% $$.What is the bulk modulus of the rubber:

Select the correct alternative(s).

Overall changes in volume and radii of a uniform cylindrical steel sire are $$0.2\%$$ and $$0.002\%$$ respectively when subjected to some suitable force. Longitudinal tensile stress acting on the wire is :-
$$(Y=2.0\times 10^{11}\ NM^{-2})$$

When the load on a wire is increasing slowly from $$2$$ kg to $$4$$ kg, the elongation increases from $$0.6$$ mm to $$1$$ mm. The work done during this extension of the wire is $$(g=10 m/s^2)$$.

What is the percentage increase in length of a wire of diamater $$2.5\ mm$$, stretched by  a force of $$100\ Kg\ wt$$? Youngs modulus of elasticity of wire $$=1.25 \times {10}^{11}\ dyne/{cm}^{2}$$

A steel wire has length 2.0  m, radius 1 mm and $$Y = 2 \times 10^{11} N/m^2$$ A sphere of mass 1 kg is attached at one end of the wire which is then whirled in a vertical circle with speed 2 rev/sec. Elongation of the wire when mass is at the lowest position.