A particle of charge -0.8 C is located at the end of a spring at some equilibrium position (left diagram). When another particle with charge +0.6 C is placed 8.5 cm below it, it drops by 3.5 cm (after any transient motion has died out). The resulting distance between the two charged particles is 5 cm. www. www. What is the spring constant, ks, of the spring in N/m?