Use Hooke’s law: (F = kx)
Rearrange to find the spring constant: (k = frac{F}{x})
Measure the applied force (F) in newtons
Measure the extension or compression (x) in meters
Divide force by displacement to get (k) in N/m
For a hanging mass, use (F = mg)
Then calculate (k = frac{mg}{x})
For multiple measurements, plot force vs. displacement
Find the slope of the straight-line graph
The slope is the spring constant (k)