1. **State the problem:** Marta dropped an item from the top of the Leaning Tower of Pisa with an initial speed $u=0$ m/s. The final speed $v$ after falling is 33 m/s, and the time taken $t$ is 3.4 s. We need to find the distance travelled $s$. 2. **Formula used:** The distance travelled when an object moves with initial speed $u$, final speed $v$, over time $t$ is given by: $$s = \frac{1}{2} (u + v) t$$ 3. **Substitute the known values:** $$s = \frac{1}{2} (0 + 33) \times 3.4$$ 4. **Simplify inside the parentheses:** $$s = \frac{1}{2} \times 33 \times 3.4$$ 5. **Multiply:** $$s = \frac{1}{2} \times 112.2$$ 6. **Calculate the half:** $$s = 56.1$$ 7. **Interpretation:** The distance travelled by the item is 56.1 meters. This means the item fell 56.1 meters from the top of the tower to the ground.