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For example , at the time t=0 , the part...

For example , at the time `t=0` , the particle is at its mean position, then at which times, the particle will have potential energy `50%` of its total energy within `t=0` to `t=T` ?
Hint `:` When PE is `50%` of total energy `(1)/( 2) kx^(2) = (1)/(2) . (1)/(2) kA^(2)`

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When PE is `50%` of total energy `(1)/( 2) kx^(2) = (1)/(2) . (1)/(2) kA^(2)`
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