I'm investigating damped oscillations using a mass held between two springs. In the experiment, I measured the spring constant using a method which now doesn't make sense. I measured it by hanging masses from ONE vertical spring and graphing the force exerted by spring (mass times 9.8) against the elongation of spring I think that's wrong. I think I should have used a pulley or something like this: the glider is held between two springs. Record its equilibrium position. 2. Attach a piece of audio tape to the glider and lay it across the “air pulley” with a small mass suspended on the end of the tape. 3. Measure the displacement of the glider from equilibrium for 4 different hanging masses. 4. Graph the weight of the hanging mass (y axis) vs. the measured displacement. But I don't even understand how this method works. What does it mean by attaching a piece of tape to the glider and laying it across the 'air pulley'? My second and main concern is that because I cannot redo the experiment, I have to somehow use the k values that I've measured using the masses hanging on the single spring. How can I fix the k values to get one that will equal the k value resulting from two springs, one on each side of the mass? URGENT!!!!!!! any input appreciated!