Question 7 1/10 The "restoring force" in a spring is given by Hooke's law, which says that = = _py where is the displacement of the spring from equilibrium, and k is the spring constant. given in units of N/m. If a 4 kg mass is hung from a spring, and at equilibrium it extends the spring a distance of 13 cm from equilibrium, what is the spring constant of the spring? Correct! 301.5 N/m Correct. you can use Hooke's law to find the spring constant