In a simple harmonic oscillator, at the mean position
AIEEE 2002, Medium
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(c) $K . E=\frac{1}{2} k\left(A^{2}-x^{2}\right) ; U=\frac{1}{2} k x^{2}$
At the mean position $x=0$
$\therefore K . E .=\frac{1}{2} k A^{2}=$ Maximum and $U=0$
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