EXAMPLE 5: THE WORK-ENERGY 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

Work-Energy relation