Calculate the elongation of the wire when the mass is at the
highest point of its path.
Express your answer using two significant figures.
  angular
velocity   ω   =   118
rev/s   =   118 * 2π Â
rad/s
                                       =   741.4      rad/s Â
   Centrifugal
force   Fc  =  m *
r * ω2
                                       =   11
* 0.47 * 741.42
                                       =   2841936.00N
   Net
force   F   =   Fc
+ m * g
                           =   2841936.00+   11
* 9.8
                           =   2842043.8
N
   Young's modulus is defined as
   Y   =   F * L /
A * ΔL
   Where ΔL is elongation produced and L = r =
length of wire
   ΔL   =   F * L /
A * Y
   =>   ΔL   =   2842043.8*
0.47/ 2.0 * 10-6 * 2.0 * 1011
                Â
=Â Â Â 3.3 * 10-3Â Â m
                  =   3.3   mm
