Question

Question
A certain lever system is only 30% efficient. What could make it more efficient? (1 point)
Responses

Use a stiffer lever to reduce energy lost bending the lever.
Use a stiffer lever to reduce energy lost bending the lever.

Use it with a lighter load to make it easier.
Use it with a lighter load to make it easier.

Have more than one person help to lift the lever.
Have more than one person help to lift the lever.

Make a longer lever that will require less force.
Make a longer lever that will require less force.

Answer 1

Use a stiffer lever to reduce energy lost bending the lever.

Reason: Efficiency losses come from energy wasted (e.g., bending, friction). A stiffer lever reduces deformation and thus less energy is lost, raising efficiency. The other options don't reliably increase mechanical efficiency.