The x-t graph of a particle undergoing simple harmonic motion is shown below.  The acceleration of the particle at t =43sec is

# The x-t graph of a particle undergoing simple harmonic motion is shown below.  The acceleration of the particle at t =$\frac{4}{3}\mathrm{sec}$ is

1. A

$\frac{\sqrt{3}}{32}{\pi }^{2}\text{ }cm/{s}^{2}$

2. B

$\frac{-{\pi }^{2}}{32}\text{ }cm/{s}^{2}$

3. C

$\frac{{\pi }^{2}}{32}cm/{s}^{2}$

4. D

$\frac{-\sqrt{3}}{32}{\pi }^{2}cm/{s}^{2}$

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