Question

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

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

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

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

Have more than one person help to lift the lever.

Answer 1

To improve the efficiency of a lever system that is only 30% efficient, the best option among the responses given is:

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

A stiffer lever will minimize energy losses due to bending and deformation, thus improving overall efficiency.