(a)[2]
On Fig. 3.2, draw labelled arrows to indicate the directions of the forces acting on the pulley.
(b(i))[1]
The force $F$ is $110\,\text{N}$. Find $T$.
(b(ii))[2]
Calculate the extension of the spring.
(c(i))[2]
A second identical spring with the same spring constant of $250\,\text{N m}^{-1}$ is now connected to the pulley as well, as shown in Fig. 3.3. The tension in the cable is unchanged. The pulley is once again in equilibrium. Determine the extension of the springs.
(c(ii))[2]
The elastic potential energy stored in the spring in Fig. 3.1 is $E_1$. The total elastic potential energy stored in the two springs in Fig. 3.3 is $E_2$. Calculate the ratio $\frac{E_1}{E_2}$.