The velocity ratio of a machine is a measure of how much faster the output moves compared to the input. It is calculated by dividing the output distance by the input distance.

For example, if an input moves 10 cm and an output moves 100 cm, the velocity ratio is 10. This means that point B moves 10 times faster than point A.

The velocity ratio is an important concept to understand when considering a machine's mechanical advantage. It can be used to compare different machines and their ability to move loads.