To calculate the efficiency of the ramp, you can use the formula:
\[ \text{Efficiency} = \left( \frac{\text{Work Output}}{\text{Energy Input}} \right) \times 100% \]
In this case:
- Work Output = 1,200 joules
- Energy Input = 2,000 joules
Substituting the values into the formula:
\[ \text{Efficiency} = \left( \frac{1,200}{2,000} \right) \times 100% \]
\[ \text{Efficiency} = 0.6 \times 100% = 60% \]
So the efficiency of the ramp is 60%.