3-8. The angular
velocity of a disk increases uniformly from 
to 
in 15 s. If the radius
of the disk is normally distributed 
, determine the distance point A travels during the time period.
Solution: 
.
3-8. The angular
velocity of a disk increases uniformly from to in 15 s. If the radius
of the disk is normally distributed , determine the distance point A travels during the time period.
Solution: .