How can the mechanical advantage of a lever be increased?

A.

by applying the force farther from the fulcrum

B.

by making the lever shorter

C.

by moving the fulcrum away from the load

D.

by applying a larger force

The answer is; A

The force or weight and distance on both sides of the fulcrum is given by the following ratio;

MA = Fb/Fa = a/b (MA = Mechanical Advantage)

The greater the distance from the fulcrum on which force is applied to lift a load on the other side of the fulcrum, the less the effort required.