2-2.
A 50 kg crate is placed on the ground, and the coefficient of the kinetic
friction between the crate and the ground is 
. If
the
motor draws in the cable with a velocity 
, where 
follows a normal distribution 
and 
is in
seconds, determine the time when the probability that the cable beaks is 0.05. Assume
that and 
are
independent, and the maximum tension the
cable can stand is 
.
Solution:
