Question

The mechanical advantage of an inclined plane is :

• A. always greater than unity
• B. always less than unity
• C. equal to unity
• D. none of the above

Answer 1

The correct option is A always greater than unity

In an inclined plane, the formula for mechanical advantage is the length of the slope divided by the height of the inclined plane. where, Mechanical advantage = $\frac{slopelength}{height}$.

Since for a right angle triangle, slope (i.e. hypotenuse ) is always greater than the height (i.e. any side), the mechanical advantage is greater than unity in case of an inclined plane.