Compare the time period of two simple pendulum of length 4 m and 49m at a same place
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T=2π
g
l
T
2
=2π
g
l
1
T
1
=2π
g
100
T
2
=2π
g
l
T
2
=2π
g
196
T
2
T
1
=
7
5
∴(ω
1
−ω
2
)t=2π
(
T
1
2π
−
T
2
2π
)t=2π
t=
2
7
t=3.5sec
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