A chimpanzee swinging on a swing in a sitting position, stands up suddenly, the time period will
A
Become infinite
B
Remain same
C
Increase
D
Decrease
AIEEE 2002,AIIMS 2012, Easy
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D
Decrease
d (d)After standing centre of mass of the oscillating body will shift upward therefore effective length will decrease and by $T \propto \sqrt l $, time period will decrease.
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