How are first-class levers different from third-class levers?

Question

First-class levers do not change the direction of the force.
First-class levers change the direction of the force.
First-class levers increase the input force.
First-class levers do not increase the input force.

Answer 1

Correct answer: First-class levers can both change the direction of the force and increase the input force, while third-class levers can only change the direction of the force but do not increase the input force.