The gradient of the line \(\frac{\text{F}}{\text{e}}\) is the spring constant, k. Key fact The gradient of the graph of force F, (y-axis), and extension e, (x-axis), is equal to the spring constant k.

3: this is the spring constant from previous experiment. 8: I put the mass at about the same location below the spring as in the video. 15: this line creates a graph. The data points are added to ...

a graph of force against extension produces a straight line that passes through the origin. The gradient of the line is the spring constant, k. The greater the value of k, the stiffer the spring.