We are asked to determine the spring constant given that it is stretched a distance of 0.391 meters and there is a restoring force of 0.922 Newtons.
To do that we will use Hooke's law:
[tex]F=-kx[/tex]Where:
[tex]\begin{gathered} F=\text{ restoring force} \\ k=\text{ spring constant} \\ x=\text{ deformation} \end{gathered}[/tex]Now, we solve for the spring constant by dividing both sides by "-x":
[tex]\frac{F}{-x}=k[/tex]now, we plug in the values:
[tex]\frac{-0.922N}{-0.391m}=k[/tex]Now, we solve the operations:
[tex]2.36N=k[/tex]Therefore, the spring constant is 2.36 Newtons.