A simple pendulum hung from the ceiling of a train moving at constant speed has a period $T$ . If the train starts acceelrating or decelerating, then what will be effect on time period of pendulumn?

Decrease in both casses

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Decrease only when train accelerates

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Decrease only when train decelerates

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Increase in both casses

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Solution

The correct option is A Decrease in both casses
As we know,
Time period of the simple pendulum,
$T = 2 π \sqrt{\frac{l}{| \to g + \to a |}}$
$\to a$ is in horizotal direction in both cases
Hence $| \to g + \to a | > g$ .So $T$ decreacse in the cases.

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Standard VIII Physics

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A simple pendulum hung from the ceiling of a train moving at constant speed has a period T. If the train starts acceelrating or decelerating, then what will be effect on time period of pendulumn?

The correct option is A Decrease in both cassesAs we know, Time period of the simple pendulum, T=2π√l|→g+→a| →a is in horizotal direction in both cases Hence |→g+→a|>g.So T decreacse in the cases.

A simple pendulum hung from the ceiling of a train moving at constant speed has a period $T$ . If the train starts acceelrating or decelerating, then what will be effect on time period of pendulumn?

The correct option is A Decrease in both casses
As we know,
Time period of the simple pendulum,
$T = 2 π \sqrt{\frac{l}{| \to g + \to a |}}$
$\to a$ is in horizotal direction in both cases
Hence $| \to g + \to a | > g$ .So $T$ decreacse in the cases.