Question

The mechanical advantage of class III levers is always.

• A. equal to 1
• B. greater than 1
• C. less than 1

Answer 1

The correct option is C less than 1

Class III levers are the levers in which the effort is in between the load and the fulcrum. So, the fulcrum is at one end of the lever, and the effort will be closer to it than the load. Thus, the effort arm is always shorter than the load arm. Hence the ratio of the effort arm to the load arm, i.e. the mechanical advantage, is always less than 1.