Question

In constructing a large mobile, an artist hangs an aluminum sphere of mass 6.0 kg
from a vertical steel wire 0.50 m long and 2.5x10-3cm2 in cross-sectional area. On the
bottom of the sphere he attaches a similar steel wire, from which he hangs a Brass
cube of mass 10.0 kg. For each wire, compute (a) the tensile Strain and (b) the
elongation.