The mechanical advantage (MA) of a lever can be calculated using the formula:
\[ \text{MA} = \frac{\text{Distance from the fulcrum to the effort}}{\text{Distance from the fulcrum to the load}} \]
In this case:
- Distance from the fulcrum to the effort = 15 meters
- Distance from the fulcrum to the load = 5 meters
Substituting the values into the formula:
\[ \text{MA} = \frac{15 \text{ m}}{5 \text{ m}} = 3 \]
Thus, the mechanical advantage is 3.