(a)[1]
State Hooke’s law in words.
(b(i))[1]
The way the force $F$ varies with extension $x$ for a spring $A$ is shown in Fig. 6.1. The point $L$ on the graph is the elastic limit of the spring. Describe the meaning of elastic limit.
(b(ii))[1]
Calculate the spring constant $k_A$ for spring $A$.
(b(iii))[2]
Calculate the work done in stretching the spring with a force of $6.4\,\text{N}$.
(c(i))[1]
For the spring combination, calculate the total extension.
(c(ii))[1]
For the spring combination, calculate the spring constant.