Physics

Problem

A mass is attached to a vertical spring with spring constant

k=75\,\text{N}\!/\!\text{m}

. The mass is pulled downward

15\,\text{cm}

from equilibrium and held at rest. What is the magnitude of the restoring force exerted by the spring on the mass while it is held? a)

5.6\,\text{N}

11.3\,\text{N}

0.75\,\text{N}

1.69\,\text{N}