00:01
Hello students in this question we have a simple pendulum simple pendulum which has the length l and the period capital t okay now it passes through the equilibrium position of the string okay then it is suddenly clamped suddenly suddenly okay from midpoint at mid point so we have to determine the new time period t -dash now we can draw the diagram for this situation okay so suppose this is the pendulum situation okay now this pendulum is released from here and this is this position will be the equilibrium position okay this is the equilibrium position of the pandoleum okay pendulum is moving on this path so this is angle theta so this will move up to here here up to suppose angle theta.
01:06
So if the time period is t, then up to here the time taken will be the t by 2.
01:13
Now when it came here, then it is clamped from this midpoint.
01:19
Now only this half part will move.
01:23
And the time period t is equals to 2 pi under root of l divided by g.
01:29
So the time period of this situation of this part in this direction.
01:34
Will be only half.
01:36
So that will be equals to 2 pi under root of l by 2.
01:40
So this is supposed the t double dash, divided by g.
01:44
So this can be written as t by under root 2.
01:47
So if time period is t then it has become t by under root 2...