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 3 and 4
Class 3 and 4

Class 1 and 3
Class 1 and 3

Class 1 and 2

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 greater force (mechanical advantage < 1). Class 1 levers can be arranged either way (depending on fulcrum position) and therefore can also require a larger applied force. Class 2 always gives a mechanical advantage > 1.