EXAMPLE 4: THE WORKENERGY RELATION

The
particle starts from rest at A and moves along the smooth circular bar under
the constant horizontal force _{} and under gravity.
Calculate the velocity of the particle as a function of _{}.

Solution:_{}
·
Work
of N equals zero since it is perpendicular to the path at all the times.
· Work of _{}_{}and mg
_{}
_{}
_{}_{}
·
WorkEnergy
relation:
_{}_{}
_{}start
from rest)
_{}
(1) into (2)
_{}
_{}