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A particle is in linear simple harmonic motion between two points \( A \) and \( B, 10 \mathrm{~cm} \) apart (figure). Take the direction from \( A \) to \( B \) as the positive direction and choose the incorrect statements.
(a) The sign of velocity, acceleration and force on the particle when it is \( 3 \mathrm{~cm} \) away from \( A \) going towards \( B \) are positive.
(b) The sign of velocity of the particle at \( C \) going towards \( B \) is negative.
(c) The sign of velocity, acceleration and force on the particle when it is \( 4 \mathrm{~cm} \) away from \( B \) going towards \( A \) are negative.
(d) The sign of acceleration and force on the particle when it is at point \( B \) is negative.
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