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A small block of mass \( 50 \mathrm{~g} \), compressing a spring (of spring constant \( k=500 \mathrm{Nm}^{-1} \) ) by \( 10 \mathrm{~cm} \) is released on a horizontal surface. The surface to the right of \( \mathrm{A} \) is rough \( (\mu=0.2) \). Find the following:
Find the time elapsed, before which the block is at rest.
(1) \( 0.75 \mathrm{~s} \)
(2) \( 1 \mathrm{~s} \)
(3) \( 0.25 \mathrm{~s} \)
(4) \( 5 \mathrm{~s} \)
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