Question

What is the use of the lever, if its mechanical advantage is less than 1?

• A. As a force multiplier
• B. To obtain the gain in speed
• C. As a work multipler
• D. To change the direction of force

Answer 1

The correct option is B

To obtain the gain in speed

For $ClassIlevers$, the mechanical advantage can have any value either greater than 1, equal to 1 or less than 1.

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

If Effort arm < load arm, then M.A < 1 as well as V.R <1.

When mechanical advantage is less than 1, it is used to obtain the gain in speed because the velocity ratio less than 1 implies that the displacement of the load is more than that displacement of effort.