Mechanical Prop...

The radius of a copper wire is 4 mm. What force is required to stretch the wire by 20% of its length, assuming that the elastic limit is not exceeded (Y=$$12 \times 10^{10} N / m^2$$

A wire of length L can support a load W. If the wire is broken in to two equal parts , then how much load can be suspended by one of those cut wires?

A rubber cord 10 m long is suspended vertically. How much does it stretch under its own weight. ( [Density of rubber is $$1500 (kg / m^3), Y = 5 \times 10^8 N/m^2)$$

Poisson' ratio is defined as the ratio of 

A student measures the poisson's ratio to be greater than 1 in an experiment. The meaning of this statement would be

When the temperature of a gas is $$20^0C$$ 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 changes by $$10$$%. The bulk modulus is

The theoretical limits of poisson's ratio lies between -1 to 0.5 because

A $$1$$m long metal wire of cross sectional area $$10^{-6}m^2$$ is fixed at one end from a rigid support and a weight W is hanging at its other end. The graph shows the observed extension of length $$\Delta l$$ of the wire as a function of W. Young's modulus of material of the wire in SI units is?

A uniform wire (Young's modulus $$2\times 10^{11}Nm^{-2}$$ ) is subjected to longitudinal tensile stress of $$5\times 10^7\ Nm^{-2}$$. If the overall volume change in the wire is $$0.02\%$$,  the frictional decrease in the radius of the wire is close to  

The ratio of the coefficient of volume expansion of glass container to that of a viscous liquid kept inside the container is $$1:4$$. What fraction of the inner volume of the container should the liquid occupy so that the volume of the remaining vacant space will be same at all the temperature?