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:
where:
- R equals resistance force
- DR equals resistance distance
- E equals effort force
- DE equals effort distance
Resistance force is used to calculate the work output using the following equation:
Famous quotes containing the words resistance and/or force:
“You may either win your peace or buy it: win it, by resistance to evil; buy it, by compromise with evil.”
—John Ruskin (1819–1900)
“Where force is necessary, there it must be applied boldly, decisively and completely. But one must know the limitations of force; one must know when to blend force with a manoeuver, a blow with an agreement.”
—Leon Trotsky (1879–1940)