EXAMPLE 5: THE WORKENERGY RELATION
The particle starts from rest at A. If the bar
is smooth and the spring has a free length of _{}, calculate the speed of the particle as a function of x.
Solution:

·
First calculate the work of the forces.
·
N does no work since it is perpendicular to the
path of the bar at all times.
_{}
_{}
_{}
Start from rest_{}
_{}
_{}
WorkEnergy relation
_{}
_{}
_{}