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A simple pendulum hung from the calling ...

A simple pendulum hung from the calling of a track moving at constant speed has a period `T` it the train start acceleration or decelerating then what be the effect on time period of pendulum ?

A

Decreases only when train accelerates

B

Decreases only when train decalerates

C

Decreases in both cases

D

Increases in both cases

Text Solution

Verified by Experts

The correct Answer is:
C
`T = 2pi sqrt((1)/((vec g + vec a))) vec a` is in horizontal direction in both cases Hence `|vec g + vec a|gt g` so `T` decrease in both cases.
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