What is the equation for the mechanical advantage of a lever?

Question

MA = length of effort arm * length of resistance arm

MA = length of resistance arm/length of effort arm

MA = length of effort arm / length of resistance arm

MA = length of effort arm + length of resistance arm

Answer 1

The correct equation for the mechanical advantage (MA) of a lever is:

MA = length of effort arm / length of resistance arm

This formula indicates that the mechanical advantage is the ratio of the distance from the fulcrum to the point where the effort is applied (effort arm) to the distance from the fulcrum to the point where the load or resistance is applied (resistance arm).