1.29 describe experiments to investigate how extension varies with applied force for helical springs, metal wires and rubber bands

- attach a spring to a Newton metre and measure its length
- Add a weight (ideally 50g) to the end of the spring and measure again
- continue to add weights and take measurements
- do this up to 400g
- plot your results on a graph

by plotting a graph of results you can see that extension increases with force