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Question

A simple harmonic oscillator starts from extreme position and covers a displacement half of its amplitude in a time 't', the further time taken by it to reach mean position is

A
2t
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B
t
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C
t/2
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D
t/2
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Solution

The correct option is D t/2
x=Acos(ωt)
Taking t=0 at extreme position.
x=A2 is reached in time t
ωt=π3;ω=π3t
x=0 is reached at ωt1=π2
t1=π2ω=π×3t2×π=3t2
t1t=t2

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