The mechanical advantage of an inclined plane is :

always greater than unity

Explanation

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 =  
\(=\frac{\text { slope length }}{\text { height }}\)

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.

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