A second's pendulum is mounted in a rocket. Its period of oscillation decreases when the rocket
A
Comes down with uniform acceleration
B
Moves round the earth in a geostationary orbit
C
Moves up with a uniform velocity
D
Moves up with uniform acceleration
AIPMT 1994, Easy
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D
Moves up with uniform acceleration
d (d) $T = 2\pi \sqrt {\frac{l}{g}} $. $T$ will decrease, If $g$ increases.
It is possible when rocket moves up with uniform acceleration.
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