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at what displacement the kinetic is eqal...

at what displacement the kinetic is eqal to the potential energy ?
Hint `: U = (1)/(2) kx^(2) , K = (1)/(2) (A^(2) - x^(2))`
`U = K`

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` U = (1)/(2) kx^(2) , K = (1)/(2) (A^(2) - x^(2))`
`U = K`
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