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
Class 1 and 2

Answer 1

Class 1 and 3.

Explanation: Class 3 levers (effort between fulcrum and load) always have mechanical advantage < 1, so you must apply more force. Class 1 levers (fulcrum between effort and load) can also require a larger input force if the effort arm is shorter than the load arm.