Question

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

Answer 1

Answer: (D)

Moves up with uniform acceleration

Answer 2

$T = 2\pi\sqrt{\frac{l}{g}}$. T will decrease, If g increases.

It is possible when rocket moves up with uniform acceleration.