This video lecture from Oscillatory Motion (F.Sc. first year physics) covers The energies present in spring and their conversion from one from to another form i.e. conversion of K.E into P.E and P.E into K.E keeping the total energy conserved. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.