(a(i))[1]
On Fig. 2.1, indicate the distance $h$ clearly.
(a(ii))[1]
Describe a practical procedure the student can use to make the measurement of the distance $h$ accurate.
(b(i))[1]
Explain why the wooden rod needs to be horizontal.
(b(ii))[1]
Suggest a way the student can check that the wooden rod is horizontal.
(b(iii))
The experiment is repeated with additional identical springs until eight springs hang side by side. The extension $h$ is recorded each time another spring is added. The results appear in the table in Fig. 2.3.
(b(iv))[2]
Describe the connection between $N$ and $h$.
(c)[1]
Suggest a possible value for the total extension of the pair of springs in Fig. 2.5.