The $x$ - $t$ graph of a particle performing simple harmonic motion is shown in the figure. The acceleration of the particle at $t=2 \mathrm{~s}$ is :

Question

$-\frac{\pi^{2}}{8} \mathrm{~ms}^{-2}$

$\frac{\pi^{2}}{16} \mathrm{~ms}^{-2}$

$-\frac{\pi^{2}}{16} \mathrm{~ms}^{-2}$

$\frac{\pi^{2}}{8} \mathrm{~ms}^{-2}$

Solution

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