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 3
Class 1 and 3

Class 1 and 2
Class 1 and 2

Class 3 and 4
Class 3 and 4

Answer 1

Class 1 and 2.

Reason: Class 2 always gives mechanical advantage >1 (effort arm longer than load arm), and class 1 can give MA >1 if the fulcrum is closer to the load. Class 3 never increases force (MA <1).