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A simple pendulum has time period 'T1'. The point of suspension is now moved upwards according to the relation y=KT2.(K=1m/sec2) where y is the vertical displacement. The time period now becomes 'T2'. Then find  the ratio of  T12T22  (g=10m/sec2)

a
56
b
65
c
43
d
34

detailed solution

Correct option is B

vertical displacement y=ut+12at2 here u=0, hence, y=12at2 given y=kt2 comparing, y=kt2=12at2 ⇒k=12×a substituting k=1 ⇒1=12×a ⇒a=2m/sec2         T1=2πlg         T2=2πlg+a on dividing above two equations,and substitute a=2        T12T22=g+ag=10+210=6/5

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A simple pendulum has time period T1. The point of suspension is now moved upward according to equation y=kt2  where k=1m/sec2. If new time period is T2 then ratio T12T22  will be


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