Which of these could NOT be used to find the mechanical advantage of an inclined plane?

Select one:

a. length and height of inclined plane

b. output force

c. percent effieciency

d. input force

The "c) percent efficiency" could not be used to find the mechanical advantage of an inclined plane. There are two formulae that could be used to determine the mechanical advantage of an inclined plane which stated as MA = Length/rise and Wout=Win. MA is the mechanical advantage, Wout is the output force, Win is the input force, and "rise" is the height of the inclined plane.