Which of the following statement is incorrect for an \( \mathrm{P} \) object executing S.H.M. : ...

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Which of the following statement is incorrect for an
\( \mathrm{P} \) object executing S.H.M. :

W
(1) The value of acceleration is maximum at the extreme points
(2) The total work done for completing one oscillation is zero.
(3) The energy changes from one form to another
(4) The velocity at the mean position is zero
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