Materials required: -vessel twine and wrist watch.

Tie the twine with the Iota and suspend it from above. The length of twine from the point of origin to the middle of the Iota is one metre. This is a type of pendulum.

Oscillate this Iota from one side to another. When it goes and returns to you, count it as 1. Find out how much time it takes for 20 oscillations. Calcula­te the time taken for one oscillation.  Next make the oscillation not so wide as before and calculate the time it takes for the same 20 oscillations. Calculate
the time taken for one oscillation now.  Does the time vary for each oscillation of the swing range or amplitude beco­mes shorter? Now pour water and fill 1/2 of it. Now calculate the time taken for one oscillation. Then fill 3/4th of it and calculate the time again for one oscillation

Is there any change in the time taken for each oscillation when the weight is changed? Then increase or decrease the length of the pendulum and calculate the time taken for each oscillation. Is there any change if the length is altered?

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