Chapter 2.3, Problem 30P

The unstretched length of the spring is r. When pin P is in an arbitrary position $\theta ,$ determine the x- and y-components of the force which the spring exerts on the pin. Evaluate your general expressions for $r=400$ mm, $k=1.4\text{kN/m,}$ and $\theta =40°.$ (Note: The force in a spring is given by $F=k\delta$ where $\delta$ is the extension from the unstretched length.)