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Q.

The time period of a simple pendulum of length L as measured in an elevator descending with acceleration g3 is

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a

2π3Lg

b

π3Lg

c

2π3L2g

d

2π2L3g

answer is C.

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Detailed Solution

The effective acceleration in a lift descending with acceleration g3 is  geff=g−g3=2g3∴T=2πLgeff=2πL2g/3=2π3L2g
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