Question

Why is the mechanical advantage of a class II lever always more than 1?

• A. The effort arm is always longer than the load arm.
• B. The effort arm is always smaller than the load arm.
• C. The effort arm is always equal to the load arm.
• D. There is no load.

Answer 1

The correct option is A

The effort arm is always longer than the load arm.

In $ClassIIlevers$, the fulcrum and the effort are at the two ends of the lever and the Load is somewhere in between the Effort and the Fulcrum.

MA of a lever $=\frac{Effortarm}{Loadarm}$

Since, the effort arm is always longer than the load arm .

From the equation above, it is clear that MA of the $ClassIIlevers$ is always greater than 1.