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A particle in \( \mathrm{SHM} \) is described by the displacement equation \( x(t)=A \cos (\omega t+\theta) \). If the initial \( (t=0) \) position of the particle is \( 1 \mathrm{~cm} \) and its initial velocity is \( \pi \mathrm{cm} / \mathrm{s} \), what is its
\( \mathrm{P} \) amplitude? The angular frequency of the particle is \( \pi \mathrm{s}^{-1} \)

W
[AMU (Med.) 2002; DPMT 2004]
(a) \( 1 \mathrm{~cm} \)
(b) \( \sqrt{2} \mathrm{~cm} \)
(c) \( 2 \mathrm{~cm} \)
(d) \( 2.5 \mathrm{~cm} \)
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