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![[Post New]](/templates/default/images/icon_minipost_new.gif) 27 Dec 2007 11:06:02 IST
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The effective length of the simple pendulum means the length of the pend from the pt of suspension to the centre of gravity of the bob.
As water comes out of the whole the c.g would be lowered so the eff length increases and thus the time period will also increase.
This will continue till the sphere is half empty.After this the c.g would again rise, decreasing the eff length and the time period of the pendulum.
Ultimately the C.G. would coincide with the centre of the sphere when the sphere is completely empty.
Now eff length becomes same as it was when it was completely filled with water and in both cases the time period will be the same.
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From J.R.R. Tolkien's 'The Lord of the Rings':
All that is gold does not glitter
Not all who wander are lost
The old that is strong does not wither,
Deep roots are not reached by frost.
From ashes a fire shall be woken
From shadows a light shall spring
Renewed shall be blade that's broken
The crown less again shall be king. |
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