Three physical quantities need to be measured in this experiment – Mass, Length and time (period). Make the following table –
Table II : The details of the physical quantities to be measured.

1. Spring constant by measuring extension:-
   1. Hang the spring to the hook. Place an arbitrary load (m₀) on the spring, large enough to ensure that the coils are separated. Add some weight to the arbitrary load and note down the extension from initial position as ‘y₀’.
   2. Repeat the previous step 4 times by adding weights.
   3. Similarly, take another spring (with a different spring constant) and repeat the above steps.
2. Spring constant by measuring time period:-
   1. Hang a known weight from the end of spring, displace the mass from its mean position by small distance below the equilibrium position.
   2. Count the time taken to complete 10 (or any sufficiently large number) oscillations using stop watch and record it.
   3. Repeat the previous step 4 times by adding weights.
   4. Similarly, take another spring and repeat the steps 1-2.
3. For Series Combination
   1. Combine the two springs, end-to-end.
   2. Repeat the measurements A and B.
      How to measure time period:
      • After starting the oscillation, wait for about five oscillations before staring the measurement of time for 10/20 oscillations.
      • Also make sure that the amplitude of the oscillation does not reduce during the measurement.
      • The oscillation must occur in a single plane.
      How to measure length:
      • Choose a reference point (preferably lower tip of the spring or lower end of the mass) on the system for counting oscillations.
      • Mark y=0 where the reference point is located when m0 is loaded.