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:
“Growing older, I have lost the need to be political, which means, in this country, the need to be left. I am driven into grudging toleration of the Conservative Party because it is the party of non-politics, of resistance to politics.”
—Kingsley Amis (1922–1995)
“March indefatigably on,
And for the last effect
Still keep thy Sword erect:
Besides the force it has to fright
The Spirits of the shady Night;
The same Arts that did gain
A Pow’r must it maintain.”
—Andrew Marvell (1621–1678)