Question

Three levers X, Y, Z of equal lengths are shown in the diagram.

1. Which class of lever do these belong to?
2. Among these (X, Y or Z) which one will give the maximum mechanical advantage? Justify your answer.

Answer 1

a. Since the fulcrum lies between load and effort, the given machine is a class 1 lever.

b. For a lever,

Mechanical advantage = `"Effort arm"/"Load arm"`

For lever X, the effort arm is greater than the load arm. Hence, the mechanical advantage is greater than one.