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A pendulum suspended from ceiling of a t...

A pendulum suspended from ceiling of a train has a time period T, when the train is at rest. When the train is accelerating with uniform acceleration 'a', the period of oscillation will

A

Decrease

B

Increase

C

Remains unaffected

D

Becomes infinite.

Text Solution

Verified by Experts

The correct Answer is:
A
When train is at rest `T=2pi sqrt((l)/(g))`.
When train accelerates then net acceleration is
`a_("net")=sqrt(g^(2)+a^(2))gt g`
`:. T.=2pi sqrt((l)/(sqrt(g^(2)+a^(2))))`
So time period decreases.
Correct choice is (a).
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