Question

In an experiment, a spiral spring was hung vertically from a stand and various weights attached in turn to its lower end. The extension of the spring for the various weight was noted. The results were recorded as shown in the following table.

Load(N)	0	0.2	0.4	0.6	0.8	1.0	1.1
Extension (cm)	0	0.95	1.9	2.9	3.9	5.5	7.25

1. Plot the graph of load (y-axis) against the extension of the spring (x-axis)
2. From the graph, determine the elastic limit of the spring 
3. From the graph, determine the spring constant within Hooke’s law

Answer 1

1.  
   
2. 0.08N
3. constant = ^F/_e 
   = slope = ^dL/_de =     0.8N       
                              3.8 × 10⁻²m
      =21Nm⁻¹