When the load applied to stretch a wire is increased from 1 kg -wt to 2kg-wt, the extension produced in the wire increases from 0.5mm to 1mm. What is the work done in the extension of the wire ?

A mass of 4kg is hung from a metal wire of radius 0.5 mm and length 3m. Find the extension produced in the wire. What should be minimum radius of the wire so that the elastic limit of 20 xx 10^7 N/m^2 of the metal wire is not exceeded ? Y=20x10^10N/m^2.

There are two wires of the same material . Their radius and length are in the ratio 1:2 If the extension produced are equal, what is the ratio of the loads

A copper wire 8 cm long is stretched to produce an extension of 0.8 cm in it . Find the lateral strain produced in the wire if sigma of copper is 0.20 .

A wire having a diameter of 3mm is streached by external force to produce a longitudinal strain of 3xx10^-3 . What will be the change in diameter if the poisson's ratio of the wire is 0.4.