$A$ $0.10\, kg$ block oscillates back and forth along a horizontal surface. Its displacement from the origin is given by: $x = (10\,cm)\cos [(10\,rad/s)\,t + \pi /2\,rad]$. What is the maximum acceleration experienced by the block?
- A$10\, m/s^2$
- B$10\pi\, m/s^2$
- C$5\pi\, m/s^2$
- D$3.33\pi\, m/s^2$
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