Physics

Problem

0.40\,\text{kg}

mass is attached to a light vertical spring of force constant

60\,\text{N/m}

. The spring is pulled downward and released from rest when it is stretched

0.15\,\text{m}

below its natural length. What is the speed of the mass as it passes through the spring’s natural length? a)

1.8\,\text{m/s}

1.4\,\text{m/s}

0.66\,\text{m/s}

2.5\,\text{m/s}