Question

The pendulum suspended from the ceiling of a train has a period T when the train is at rest. When the train is accelerating with an uniform acceleration, the period of oscillation will –

• A. Increase
• B. Decrease
• C. Remain unaffected
• D. Become infinite

Answer 1

Answer: (B)

Decrease

Answer 2

Comparing with y = 2p $\sqrt{\frac{\mathcal{l}}{g}}$ ^;

T' = 2p $\sqrt{\frac{1}{\sqrt{g^{2} + a^{2}}}}$

clearly, T' < T