1.1. Figure 1 shows two identical light cables attached symmetrically to a load of weight $W$ N.
Each cable is under the same tension $T$ N and meets the vertical at an angle $\theta$.

The load is initially at rest. No forces other than its weight and the tensions in the two cables act on the system.

Write down an inequality for $W$ in terms of $T$ and $\theta$ that must be satisfied if the cables are to start lifting the load.

1.2. Using your result from part (a), or otherwise, show that when the cables are in a position such that $\theta =45$, the upward acceleration of the load is still positive only if

$T>\frac{\sqrt{2}}{2}W$