Simple Lifting Machines:

There are some technical terms which are utilized vis-à-vis, lifting machines.

Let a load 'W' be lifted by applying an effort 'P'. While load lifting operation is done, effort and load move unequal distances. Let the load move by a distance 'x', and effort move by a distance 'y'.

Mechanical Advantage (M. A.)

This is defined as the ratio of load 'W' lifted to the effort 'P' applied.

M. A. = Load or weight / Effort = W/ P

Velocity Ratio (V. R.)

This is defined as the ratio of the distance moved by effort 'y' to the distance moved by load or weight 'x'

V. R. = Distance moved by effort/ Distance moved by load =  y/x