The answer you’ve all been waiting for

There was sooooo much interest in my little poser about My Grandfather’s Clock  –  on a quick count, zero.

Anyway, I know really you can’t wait any longer for the solution to ‘how long is the pendulum?’.

So

Period = tick – tock,  ie 2 seconds

Formula is   2 x pi x Sqrt ( Length / acceleration due to gravity ) = 2
.
.   .      Length = Acceleration due to gravity / pi x pi  =  9.8  /  9.87  =  1 m near as dammit.

And here’s the proof

DSC00413

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Come on you lot, tell me what you think!