Extension questions:
5.
Suppose this sample of wire was replaced with one of half the diameter.
What would be the new value of the stress?
6.
What extension would be produced?
Using steel wire
The copper wire was replaced with a 1.6 m sample of steel wire of diameter 0.24 mm. Steel is stiffer
than copper. Assume that the Young modulus of the steel used is twice that of copper.
7.
What value of extension would you expect for the same load of 10 N?
What length of wire would be needed to give an extension of 3.5 mm?