(a)[2]
Calculate the spring constant $k$ for the spring.
(b)[1]
A student states that the spring has not yet reached the limit of proportionality when a force of 4500 N is applied to it. State how the graph shows that this statement is true.
(c)[2]
Springs may be compressed by forces. The spring shown in Fig. 1.1 is compressed by a force $F$ and has an extension of $-0.025\,\text{m}$. Determine $F$.
(d)[1]
State whether force is a scalar quantity or a vector quantity. Explain your answer.