Question

With which class of levers is it possible to increase the force that must be applied?(1 point)
Responses

Class 2 and 3
Class 2 and 3

Class 1 and 2
Class 1 and 2

Class 3 and 4
Class 3 and 4

Class 1 and 3

Answer 1

Class 1 and 3.

Explanation: Class 3 levers always have the effort between fulcrum and load, so the effort arm is shorter and you must apply a larger force (mechanical disadvantage). Class 1 levers can either increase or decrease the required force depending on the relative distances of the effort and load from the fulcrum.