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Q.

A pendulum suspended from the ceiling of the train has got a time period of two second when the train is at rest. What will be the time period of the pendulum if the train accelerates at 10 m/s2?

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a

22s

b

none of these

c

(2/2)s

d

2 s

answer is D.

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Detailed Solution

Net acceleration = =a2+g2
=(10)2+(10)21/2=102 T=2πl10= T1=2πl102 =2πl101(2)1/4=2(2)1/4

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