force multiplying levers allow us to move a heavy load with a small effort
the mechanical advantage of a force multiplying lever is defined as
mechanical advantage = load / effort
what is the mechanical advantage of a lever
a. if one unit of effort is used to lift a load of 3 units
b. if 3 units of effort is used to lift a load of 6 units
c. if 5 units of effort is needed to lift a load of 5 units
what does the mechanical advantage tell us in each of these situations?