Schematic diagrams with variable positions of Fulcrum, Load and effort for the levers of class I are shown below.
Their MA values, respectively, will be
M.A. = 1 , M.A > 1 and M.A < 1
MA=EA/LA, thus
If EA = LA , then the lever has MA = 1
If EA < LA , then the lever has MA < 1
If EA > LA , then the lever has MA > 1