Trevor's Efficient Ramp Work
What was the mechanical efficiency of using the ramp?
Trevor used a ramp to get a box into a truck. His input work was 700 J and the output work was 400 J. What was the mechanical efficiency of using the ramp?
A. 175%
B. 57.1%
C. 100%
D. 42.8%
Answer:
The mechanical efficiency of using the ramp was 57.1%.
When Trevor used a ramp to get a box into a truck, the input work he did was 700 J, while the output work was 400 J. To calculate the mechanical efficiency, we use the formula:
Mechanical Efficiency = (Output Work/Input Work) x 100%
Plugging in the values:
Mechanical Efficiency = (400 J / 700 J) x 100%
Mechanical Efficiency = 0.571 x 100%
Mechanical Efficiency = 57.1%
Therefore, the mechanical efficiency of using the ramp in this case was 57.1%, indicating that 57.1% of the input work was transformed into useful work output.