Question

Which of the following is an example of force multiplier in class $\text{I}$ levers?

Answer 1

Class $\text{I}$ lever behaves as a force multiplier when the effort arm is longer than the load arm. And such a case can be observed in the crowbar which is used to lift heavy stones by applying lesser effort. Hence, it is a force multiplier and belongs to class $\text{I}$ lever.