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Grade: 12th pass
        
If length of a pendulum is increased by 44%, its time period increased by
A. 10%
B. 20%
C. 30%
D. 40%
4 months ago

Answers : (2)

Arun
23044 Points
							

Time period of a pendulum is given by the formula, T= 2pi * sqrt(l/g)

So if the length is increased by 44% i.e l’= 1.44l

The new time period, T’=2pi *sqrt(1.44l/g) = 2pi *1.2 * sqrt(l/g)

So the new time period is 1.2 times of the old one or you can say it increased by 20%.

4 months ago
Vikas TU
9517 Points
							
Dear student 
we can also do this by this short method 
Because the length is increased by 44% , L = 1.44L 
New time period = T* sqrt(1.44) = 1.2T 
Thus there is 20% increasein time period. 
4 months ago
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