(a)[1]
State the law that relates the force to the extension.
(b)[2]
Find the spring constant, in $\text{N m}^{-1}$.
(c)[2]
Find the elastic potential energy when $F = 6.0\,\text{N}$.
Physics 9702 · AS & A Level · Elastic and plastic behaviour
Elastic and plastic behaviour — practice question
One end of a spring hangs from a fixed point. A vertical force is then applied to the opposite end, causing the spring to stretch. Figure 4.1 shows how the applied force $F$ varies with the spring length $L$.