Answer:
The Potential Energy of the Swing is Changing in to Kinetic Energy when is start moving.
Explanation:
When the Swing is pull at its extreme point then it has maximum potential energy. Because the formula of potential energy is:
P.E. = (1/2)k*x^2
Here x shows the body displacement from the mean (Equilibrium) position. Since at maximum position the displacement is maximum therefore the P.E. is maximum at the extreme point.
When the Swing is released and start moving from extreme position to mean its P.E. is changing into Kinetic Energy. Because with the movement towards the mean position body acquire more speed and that speed increases its velocity. Since Kinetic Energy is given as:
K.E. = (1/2) m*v^2
Therefore with the increase in velocity kinetic energy increases.
But when body again moving towards the extreme position, its kinetic energy again changes into P.E with the same reason as I discussed in the above paragraph.
Some of the energy is also changes in to heat in order to overcome air resistance.
