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 Clicking on start.The
red line indicates the potential energy and blue one the kinetic energy.See
how the later increases at the cost of earlier one keeping the net energy
constant.The amount of red color in rectangle indicates the amount of
kinetic energy that the particle has.Initially it has none but as the particle
heads towards the mean the KE increases and becomes maximum at mean and
thereafter it decreases.
For visualizing what's happening consider a gravity pendulum
left from the right extreme.
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In this demo, I would like
to stress upon the energy consideration about which I talked so much in the last
class.The particle executing SHM is supposed to be at the right extreme.In this
position the particle has maximum potential energy and minimum kinetic energy.The
potential energy has been assumed to be zero at mean position. Worthy to note
is that the total energy remains constant because there is no dissipative force.