Question

A wire stretches 8mm under a load of 60N. A second wire of the same material, with half thediameter and a quarter of the length of the first wire, is stretched by the same load.
Assuming that Hooke's law is obeyed, what is the extension of this wire ?
A 1mm
B.4mm
C.8mm
D.16mm​

Answer 1

Answer:

nice question

but I don't know

Answer 2

Answer:

Reference: Past Exam Paper – June 2012 Paper 12 Q25

Solution 363:

Answer: C.

Hooke’s law: F = kx

The extension x does not depend on the diameter and area of the wire.

As the wire is of the same material, the spring constant, k is also the same.

So, the wire will have the same extension since the same load is used.