Resistance force

In physics, resistance force is the force which an effort force must overcome in order to do work on an object via a simple machine. Resistance force, like most other forces, is measured in newtons or in pounds-force.

For an ideal (frictionless) mechanism in which no energy is lost, resistance force obeys the relation:

$R \times D_R = E \times D_E$

where:

R equals resistance force

D_R equals resistance distance

E equals effort force

D_E equals effort distance

Resistance force is used to calculate the work output using the following equation:

$Work\,output = R \times D_R$