10.
The weight of a grinding wheel is 
.
It has a diameter of 
, a thickness of 
, and a bore with a diameter of 
. The material is isotropic, and
the Poisson’s ration is 
. If the speed of the
wheel is 
, the allowable tangential stress
is 
, and 
and
are independent, determine the
probability of failure using the First Order Second Moment Method.
