1. The unstretched length of the spring is r. When pin P is in an arbitrary position (), 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 kN /m, and () = 40°. (Note: The force in a spring is given by F = k8, where 8 is the extension from the unstretched length.)
2. Refer to the figure and statement of Prob. 1. When pin P is in the position () = 20°, determine the n- and t-components of the force F which the spring of modulus k = 1.4 kN /m exerts on the pin. The distance r = 400 mm.
