Physics

Problem

2.0\,\text{kg}

block rests while compressing a horizontal spring of force constant

400\,\text{N\,m}^{-1}

10\,\text{cm}

. Neglecting friction, calculate the speed of the block as it crosses the spring’s natural length. a)

2.0\,\text{m\,s}^{-1}

1.4\,\text{m\,s}^{-1}

2.8\,\text{m\,s}^{-1}

0.71\,\text{m\,s}^{-1}