Attempting to measure the force constant of a spring, an experiment clamps the upper end of the spring in a vise and suspends a mass of 1.6 kg from the lower end. This stretches the spring by 0.23 m. What is the force constant of the spring?
M*g = 1.6*9.8 = 15.7 N. = Force of the mass.
k = 15.7N./0.23m = 68.2N./m.