Q.

Time period  of   a  simple  pendulum  is T .The  time  taken  to complete  58  oscillations  starting   from  mean positions  is αβT   The value of  (α+β)  is  

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answer is 19.

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Detailed Solution

58     oscillation  = total  oscillation  38  oscillation 
y=A/2
t=T2+T12=7T12 
 =7

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Time period  of   a  simple  pendulum  is T .The  time  taken  to complete  58  oscillations  starting   from  mean positions  is αβT   The value of  (α+β)  is