Chain on a hillock

Consider two hillocks adjacent to each other with smooth surfaces,

They may have any shape, A silver chain lying midway between them initially has "half" of its length on one hillock and half on the other hillock ,, and rises to an equal height 'H" initially on either of them, (Refer to figure)

The earth as usual has gravitational field.

And the slope of the part where the chains end terminate have slope 90 degree.

You may refer to the figure now

Now if i slightly displace the chain towards the centre and release, find the time period of oscillations.

( in seconds)

DETAILS

\bullet Mass= 1

\bullet height =1

\bullet l= 1

\bullet g =10

NOTE

\bullet Assume all ideal Conditions.

HINT

\bullet internal tension of chain cancels out

\bullet It is a free chain.

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