Question

how does the knowledge on conservation of energy helps us solve problems on free fall and motion problems? What is the difference when we used it instead of kinematics?

Answer 1

Well you could say that the conservation of energy saves time from doing the kinematic equations. It all starts off with

P.E.+ K.E=P.E.+K.E.

P.E.=mgh

K.E=1/2mv^2