What is Mechanical Advantage?

Mechanical Advantage:

Mechanical Advantage is defined as the ratio of the load to the effort. In a four bar mechanisms is shown ib below fig: The force FA acting at A is the effort and the force FB at B will be the load or the resistance to overcome. We know from the principle of conservation of energy, neglecting effect of friction.

FA x vA = FB x vB

or FB / FA = vA/vB

∴ Ideal mechanical advantage,

M.A(ideal) = FB / FA = vA/vB